Color Tools

Browse all available color tools.

Available tools

Alpha Compositing Calculator Composite a source color over a backdrop color with straight-alpha source-over blending.
Analogous Hues ±30° Named Analogous angular hue-wheel construction (not RGB hue conversion, perceptual harmony or automated accent policy). Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
ANSI 256 Index From RGB Match encoded RGB by Euclidean channel distance to explicit canonical xterm 256 palette, first-index ties; terminal ANSI 0–15 are theme-dependent, so assigned index may not render the assumed palette on every terminal.
APCA Lc Contrast Approximation Opaque normalized encodeds RGBAPCA 0.0.98 G-style constant approximation (experimental Lcnot WCAG ratio), black clamp and polarity retained; not official certified APCA implementation or font-size conformance. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Aura Color Fun Lookup Bounded fictional aura-color associations for amusement, not measurement of personality, spirituality or health.
Auto Black/White Text Picker Select higher WCAG-style relative-luminance black/white text contrast on actual opaque sRGB background, with deterministic black tie; caller threshold is not full typography, alpha/compositing, WCAG conformance or APCA analysis.
Bayer 4×4 Dither Threshold Matrix Lookup Apply Bayer 4×4 ordered thresholds (rank+0.5)/16 to actual normalized gray image using explicit tile origin; strict greater-than threshold, no error diffusion, printer dot-gain model or luminance conversion implied.
Birthstone Month Color Lookup One illustrative modern birthstone per month, not exhaustive or gem-authentication data; alternative traditions vary.
Blackbody Kelvin to xy Chromaticity Approx Use bounded piecewise polynomial Planckian-locus xy approximation for 1667–25000 K; not spectral integration, measured lamp chromaticity, daylight locus or exact correlated color temperature.
Bootstrap Theme Color Nearest Lookup Nearest caller framework/version Bootstrap theme Lab reference, semantic label not inferred from hue. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Brand Color Perceptual Distance Rank Rank actual caller brand reference CIELAB swatches in one white/reference frame by CIE76 distance with stable tie provenance; no invented proprietary brand palette, spectral equivalence or trademark authorization.
Brand Hue Variance Degrees Across Assets Audit asset hue offsets against explicit reference with circular mean/resultant and absent-mean flag for antipodal cancellation; hues should represent chromatic assets, no arithmetic mean across 0/360 or automatic brand tolerance.
Categorical Minimum Delta-E Pairwise Audit all categorical same-white CIELAB palette pairs for minimum CIE76 separation, exposing closest first-ordered pair; not a scalar CIE76 alias, categorical readability guarantee or color-deficiency simulation.
CCT From xy Chromaticity Approx Compute McCamy approximate CCT from physical xy inside explicit caller bounded polynomial n-domain; not a universal temperature for any chromaticity or standards-grade CCT/Duv validity certification.
Chroma Value From OKLCH OKLCH chroma from directly supplied OKL ab opponent axes, not Lab chroma or arbitrary gamma RGB saturation. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
CMYK to HEX Print Conversion Convert normalized CMYK to naive multiplicative device RGB/HEX; explicitly unprofiled, not accurate press color, ink coverage, substrate behavior or ICC color management.
Color Blend Calculator Blend two hexadecimal sRGB colors by interpolating their channels.
Color Shade and Tint Generator Generate paired white-tint/black-shade RGB ladders at actual caller fractions in gamma-encoded sRGB; unlike scalar blend this constructs two coordinated bounded schedules. Not pigment mixing or perceptually uniform steps.
Color-Blind Safe Palette Band Check Audit all palette pairs in OKLab after three explicit dichromacy model simulations against caller distance threshold; this model screen is not a color-blind-safe guarantee, luminance contrast test or individual visual diagnosis.
Complementary Hue Rotation 180° Named Complementary angular hue-wheel construction (not RGB hue conversion, perceptual harmony or automated accent policy). Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Contrast Ratio Calculator Compute WCAG contrast ratio between two luminance values.
Contrast Ratio Practice Create reproducible practice for Contrast Ratio Calculator from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
Crayola Nearest Color Name Lookup Nearest caller edition/medium Crayola Lab palette, not pigment formulation or invented brand swatches. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
CRT P322 Green Phosphor Lookup Qualified caller-reference registry: actual phosphor manufacturer designation/edition and measured spectrum/chromaticity; P322 not treated as universal RGB. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.
CSS color-mix Percent in OKLab Mix opaque gamma-sRGB colors in OKLab using CSS-style normalized weights and alpha reduction if total weight below 100%; explicit two weights, no missing components, premultiplied input alpha, hue interpolation or gamut-mapping certification.
CSS hue-rotate Invert Equivalent Apply CSS-style invert then gamma-domain hue-rotate matrix in stated order, clipping/reporting output channels; HSL hue rotation is not generally equivalent. No claim about other filter order or browser color-management pipelines.
CSS Relative Color Syntax Builder Build injection-safe CSS relative-color syntax with a literal six-digit source and explicit substituted OKLCH channels; no CSS parser evaluation, browser support guarantee or statement that channels remain in gamut.
D50 vs D65 White Point Delta E Actual independently measured D50/D65 white responses in ONE common CIELAB reference; own-white normalized Lab values both 100,0,0 are not a physical illuminant difference. No invented XYZ adaptation. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Dark-Mode Lightness Inversion Heuristic Apply explicitly heuristic HSL lightness inversion and caller dark-mode bounds, retaining hue/saturation and clipping evidence; not accessible theming, contrast compliance or perceptual inversion.
Delta E 76 Color Difference Compute the CIE76 (Delta E 1976) difference between two sRGB hex colors via CIELAB.
Delta E CIE2000 Calculator Compute CIEDE2000 with explicit positive parametric factors and same-white CIELAB inputs; supports neutral chroma and hue wrap, not a spectral color-match or universal perceptibility judgement.
Delta E CIE76 Calculator CIE76 Euclidean distance on directly supplied same-white CIELAB coordinates, unlike existing s RGB hex→Lab conversion. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Delta E CIE94 Calculator Compute reference-weighted CIE94 on same-white caller CIELAB using graphics/textile constants; asymmetric reference weighting is preserved, not a CIE76 alias or a universal acceptability threshold.
Delta E CMC Calculator Compute asymmetric CMC l:c same-white CIELAB difference with caller positive lightness/chroma weights; reference/sample direction matters and l:c choice does not certify color acceptability.
Deuteranopia Simulation Matrix Apply Machado et al. 2009 full-severity deutan matrix in linear sRGB then encode, reporting clipping. Model visualization only, not diagnosis, an exact individual view or accessibility certification.
Display-P3 Out-of-Gamut Flagger Transform gamma-encoded Display-P3 D65 into unclipped linear sRGB and expose excursions under fixed 1e-7 numerical tolerance; not clipping, ICC-profile conversion, HDR transfer or percentage gamut coverage.
Diverging Scheme Midpoint Neutral Check Audit caller measured diverging-scheme midpoint same-white CIELAB chroma against explicit inclusive neutral tolerance; neutrality alone does not establish perceptual balance, accessibility or symmetry of endpoints.
E-Ink 16-Level Grayscale Map Quantize actual normalized grayscale to sixteen levels with half-up ties and explicit device code polarity; no e-ink waveform/ghosting model, RGB luminance interpretation or specific panel protocol.
Feng Shui Direction Color Lookup Bounded illustrative later-heaven compass/wuxing associations; not a building, health or fortune prediction.
Film Stock Look LUT Family Note Lookup Qualified caller-reference registry: actual film stock, exposure/development, scan/color management and independently identified LUT provenance; does not emulate film. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.
Five Elements Traditional Color Lookup Bounded common Chinese wuxing color associations; qing is not one modern standardized RGB color.
Flag Dominant Hue Average Extractor Extract weighted circular mean from caller annotated flag/image hue samples, excluding achromatic evidence while retaining its area share; not image decoding, dominant-cluster inference or a hue for white/black areas.
Game Boy DMG Four-Tone Palette Map Map actual Game Boy two-bit pixel codes through explicit four-shade BGP mapping and pack the register value; not arbitrary invented hardware RGB colors, LCD emulation or a ROM/hardware write.
Gradient Stop Even Spacing Count Build bounded endpoint-inclusive gradient stop positions in explicit percentage units; repeated coincident stops are permitted, color interpolation/hard-stop semantics are not guessed.
Heraldic Tincture Metal Rule Check Basic conventional heraldic tincture same-metal/same-colour screen with independently verified exceptions and fur distinct; not heraldic validity or visual contrast. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
HEX to CMYK Conversion Convert six-digit encoded RGB HEX to naive maximum-black CMYK decomposition; no print profile, rendering intent, total-ink-limit enforcement or colorimetric equivalence assumed.
HEX to Nearest HTML Color Name Nearest of sixteen HTML4 basic named colors by encoded 8-bit RGB squared distance; ties retained, not full CSS/X11 table or perceptual distance.
HSL Lightness Shift Percent Adjust actual RGB through HSL using additive signed lightness percentage points, clipping only lightness and reporting clipping; not multiplicative brightness, CSS matrix filtering or perceptually uniform change.
HSL Saturation Adjust Percent Adjust actual RGB saturation by signed HSL percentage points with explicit clipping flag; achromatic input uses canonical hue zero and no arbitrary latent hue is inferred.
Hue Shift Degrees Tool Rotate actual RGB hue through HSL while preserving saturation/lightness; this is not CSS hue-rotate matrix equivalence and achromatic hue evidence stays absent.
LCH Components From LAB Converter Convert caller same-reference CIELAB axes to polar CIELCH with [0,360) hue; neutral hue uses zero sentinel with unavailable flag, not a misleading hue assignment or RGB/OKLCH converter.
LED PWM Duty Cycle Gamma 2.2 Brightness Map caller target perceptual-brightness fractions through explicit gamma-2.2 power heuristic to duty and bounded PWM codes; uncalibrated, no LED electrical current, thermal safety or exact visual response guarantee.
Litmus Red/Blue pH Range Check Illustrative aqueous litmus transition ~4.5–8.3, inclusive endpoints indeterminate; not assay calibration or solution identification.
Liturgical Season Color Lookup Qualified caller-reference registry: actual denomination, rite, local calendar, season and independently applicable liturgical-color convention. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.
Luminance-Weighted Grayscale Converter D65 sRGB linear-light luminance to encoded achromatic RGB; not an achromatopsia clinical simulation.
Material Palette Step Classify (50–900) Classify actual color against independently supplied edition-specific Material numeric shade references, not infer uniform perceptual step spacing. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Midpoint Color Linear Interpolation RGB Component midpoint in declared encoded normalized RGB coordinates, not linear-light or perceptual interpolation.
Monochrome Lightness Steps Generator Generate endpoint-inclusive bounded HSL lightness ladder retaining caller hue/saturation and allowing descending ramps; not perceptually uniform OKLCH steps or a guarantee of distinguishable colors.
Mood Ring Temperature Fun Lookup Qualified caller-reference registry: entertainment only: actual thermochromic ring formulation/calibration and temperature, not emotion or health measurement. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.
OKLCH Chroma Clamp sRGB Max Search first radial sRGB-gamut boundary at fixed OKLCH L/h up to requested chroma using 512 scan steps and 48 bisections, preserving hue/lightness within matrix tolerance; numerical first-crossing clamp, not a global CSS gamut-map implementation or exact maximum over disconnected gamut intervals.
Paint Coverage Two Coats Tint Base Lookup Independent actual TWO COAT coverage calibration by tint base/substrate; no multiplying by two again or universal catalog coverage, caller additive purchase waste convention. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Paint Parts Mix Ratio Two Colors Scale caller paint volumetric parts to an additive-volume batch; not RGB pigment mixing, mass fractions without densities or a guarantee of finished color/volume when contraction occurs.
Pantone Nearest RGB Lookup Approximate nearest caller licensed/versioned Pantone swatches in explicitly independently converted same-white Lab, not spectral/profile equivalence or proprietary dataset publication. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Perceived Brightness HSP Calculator Compute normalized HSP heuristic brightness from gamma-encoded sRGB with fixed .299/.587/.114 squared weights; not relative luminance, WCAG contrast, or individual perception.
Planckian Track Duv Approximation Approximate signed local CIE1960 uv normal displacement at explicitly supplied reference temperature, positive toward increasing v; not global nearest-locus CCT search or standards-grade Duv far from the reference tangent.
Pride Flag Variant Stripes Lookup Qualified caller-reference registry: actual named flag edition and independently verified ordered stripe/color source; no identity inference. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.
Protanomaly Severity Interpolation Interpolate adjacent published Machado protanomaly matrices at 0.1 severity steps in linear RGB, then encode/clamp and report excursions; a model visualization, not an exact individual view, clinical severity scale or accessibility certification.
Protanopia Simulation Matrix Apply Machado et al. 2009 full-severity protan matrix in linear sRGB then encode, reporting clipping. Model visualization only, not diagnosis, an exact individual view or accessibility certification.
RAL Classic Nearest Match Lookup Approximate nearest caller independently verified RAL Classic swatches in same-white Lab, not paint-formulation match. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Rec.2020 Coverage Note Lookup Rec.2020 coverage semantics, no fabricated universal gamut-coverage fraction. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Registration Mark CMYK 100% All Check Check observed registration-mark process separations for 100% in all four channels under tiny caller measurement tolerance; mark-only screen, not permission to print 400% ink in ordinary art or a press-safety test.
Relative Luminance Calculator Compute WCAG relative luminance from RGB values 0-255.
Relative Luminance Practice Create reproducible practice for Relative Luminance Calculator from supplied scenarios, returning validated questions and computed answers under the source tool's assumptions and limits.
Rich Black Composition Lookup Caller independently verified press/profile/substrate rich-black separation recipe notice; not universal CMYK build or printing ordinary artwork at registration 100%allinks. Exact independently verified context/edition key; not embedded or live reference data. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Screen Frequency LPI Dot-Gain Estimate Matched same press/substrate/tone actual screen-frequency vs independently assayed tone-value increase, signed dot-gain evidence allowed. Matched piecewise-linear observational calibration with no extrapolation. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Semantic Status Hue Standard Lookup Caller independently versioned design-system semantic status/hue mapping; warning/error/success hue is not universal or accessible without redundant cues. Exact independently verified context/edition key; not embedded or live reference data. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Sepia Matrix CSS Filter Values Apply CSS sepia matrix interpolated with identity in gamma-sRGB, exposing output clipping; artistic filter not historical film emulsion or a perceptual color correction.
Sequential Viridis Class Breaks Lookup Generate explicit equal-interval scalar class breaks for caller sequential Viridis application, no color interpolation, quantiles or claim Viridis specifies universal class boundaries. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Seven Chakras Color Order Lookup Common modern seven-chakra rainbow associations only; not a universal historical tradition or physiological claim.
Shadow Color Derived From Base Alpha Derive base-colored shadow by caller linear-light retention and separate alpha, outputting safe CSS; does not composite against unknown backdrop, multiply alpha twice or determine a visual depth/contrast guarantee.
Spectral Band Name From nm Lookup Exact caller independently documented spectral named bands with lower-inclusive/upper-exclusive boundaries and overlaps retained; visible color names not universal wavelength identity. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Split-Complementary Hues 150°/210° Named Split Complementary angular hue-wheel construction (not RGB hue conversion, perceptual harmony or automated accent policy). Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Spot vs Process Cost Factor Lookup Same job/currency actual spot vs process print quote contrast, exact safe minor units; no universal plate/run cost multiplier. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
sRGB Gamut RGB Bounds Checker Check caller unclipped linear sRGB channel bounds with tiny explicit numerical tolerance and directional witnesses; unlike clipped converters it preserves out-of-gamut evidence, not rendering intent or perceptual gamut mapping.
Tailwind Palette Nearest Shade Lookup Nearest caller exact framework/version Tailwind shade Lab reference with ties retained, no bundled current palette. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Team Color Conflict Distance Checker Same-white CIELAB Delta E76 separation screen; not color-vision accessibility or team-identity certification.
Terminal ANSI-16 Pastel Theme Generator Transform all sixteen caller ANSI palette slots by encoded white blend, no hidden default theme or automatic contrast guarantee.
Tetradic Hue Rotation ±90°/180° Named Tetradic angular hue-wheel construction (not RGB hue conversion, perceptual harmony or automated accent policy). Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Tones Generator Mix Gray Percent Construct gamma-sRGB tone ladder toward caller neutral gray rather than assuming 50% gray, with explicit fractions; not subtractive ink or paint mixing.
Total Ink Coverage Area Limit Check Audit actual CMYK separations for summed total-ink coverage against caller substrate/press ceiling; not an invented universal ink limit, automatic black replacement or print-profile conversion.
Trans Flag Stripe HEX Lookup Common digital sRGB transcription of the five-stripe transgender pride flag; textile/print values may vary, not identity classification.
Trapping Overprint Requirement Basic Check Independently observed registration/knockout/ink/substrate job facts against caller pre press review requirements; not infer trap width or safe overprint from hue. Independently declared positive evidence requirements; overlaps and unknowns retained. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Triadic Hue Rotation ±120° Named Triadic angular hue-wheel construction (not RGB hue conversion, perceptual harmony or automated accent policy). Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
Tritanopia Simulation Matrix Apply Machado et al. 2009 full-severity tritan matrix in linear sRGB then encode, reporting clipping. Model visualization only, not diagnosis, an exact individual view or accessibility certification.
Universal Indicator pH Band Lookup Qualified caller-reference registry: actual indicator formulation, solvent, illumination and independently validated pH/color chart. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.
Wavelength nm to Approx RGB Approximate visible-wavelength display RGB using explicit piecewise artist heuristic and gamma/edge attenuation; no colorimetric spectral integration, actual monitor gamut equivalence or observer sensitivity curve.
Web-Safe 216 Nearest Index Quantize encoded normalized RGB to 6-level web-safe cube, half-up channel ties and explicit red-major index; legacy palette reduction, not modern browser display safety or perceptual nearest match.
White Point D65 Calibration Check Compare measured physical xy white to nominal D65 (.3127,.3290) in CIE 1960 uv using caller tolerance; not CIE1976 u′v′, full display calibration, spectral white equivalence or a color-difference of arbitrary XYZ tristimulus magnitudes.
WS2812 GRB Byte Order Check Serialize actual RGB bytes into declared WS2812 GRB order and audit observed sequence including missing/extra bytes; no electrical timing, chip-variant auto-detection or hardware write is performed.
X11 Nearest Color Name Lookup Nearest caller independently verified X11 name Lab palette, not CSS named-color alias or single nearest tie suppression. Explicit declared color space/reference and caller applicability; not spectral equivalence, pigment mixing, press readiness or accessibility certification.
YIQ Luma Value Calculator Compute normalized YIQ gamma-domain luma, not linear-light luminance or accessibility contrast; caller RGB is encoded sRGB interpreted under this explicit legacy weight heuristic.
Zodiac Sign Color Lookup Qualified caller-reference registry: entertainment-only caller chosen zodiac color tradition; no scientific personality or fixed cross-tradition mapping. Requires independently applicable source/context/date evidence; not an authoritative table, omitted predictive model, diagnosis, permission, safety or compliance determination.