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.
Description
CIE76 expresses Lab color difference as Euclidean distance in three coordinates.
CIE76 expresses Lab color difference as Euclidean distance in three coordinates.1
Both measurements must share a compatible reference and measurement convention. Use Delta E CIE76 Calculator to evaluate the supplied inputs under the model explained below.
When to use Delta E CIE76 Calculator
Use Delta E CIE76 Calculator to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Delta E CIE76 Calculator and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Reference lab, Sample lab using the field table and validation rules below, then run the tool.
- Read Delta e cie76; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| referenceLab | Reference lab | array of number | Required; constraints below |
| sampleLab | Sample lab | array of number | Required; constraints below |
Enter exactly three finite components for each reference and sample Lab vector. Subtract componentwise and return the Euclidean norm as ΔE76. No permitted coordinate range is inferred, and the tool does not convert RGB, adapt white points or apply CIE94/CIEDE2000 weighting.
ΔE76 = hypot(Lref−Lsample,aref−asample,bref−bsample) Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| deltaECie76 | Delta e cie76 | number |
{
"input": {
"referenceLab": [
50,
3,
4
],
"sampleLab": [
50,
0,
0
]
},
"output": {
"deltaECie76": 5
}
}Limitations and assumptions
Lab coordinates describe lightness and two opponent axes. This tool applies the basic Euclidean CIE76 distance; it does not implement CIE94 or CIEDE2000 weighting.2
Both measurements must share a compatible reference and measurement convention. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use D50 vs D65 White Point Delta E for a related task: Color differences need coordinates expressed under one comparable reference convention.
Use Chroma Value From OKLCH for a related task: Oklch chroma is the radial magnitude of Oklab's two chromatic coordinates.
References
-
Delta E CIE76 Calculator — tool.io
Similar or alternative tools
- D50 vs D65 White Point Delta E
Color differences need coordinates expressed under one comparable reference convention.
- Chroma Value From OKLCH
Oklch chroma is the radial magnitude of Oklab's two chromatic coordinates.