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color-diff
Advanced tools
Implemets the CIEDE2000 color difference algorithm, conversion between RGB and LAB color and mapping all colors in palette X to the closest or most different color in palette Y based on the CIEDE2000 difference.
The color-diff npm package is used for color difference calculations and color palette reduction. It provides utilities to find the closest color match from a palette and to calculate the difference between colors using various algorithms.
Calculate Color Difference
This feature allows you to calculate the difference between two colors. The `diff` function takes two color objects and returns a numerical value representing the difference.
const colorDiff = require('color-diff');
const color1 = { R: 255, G: 0, B: 0 };
const color2 = { R: 0, G: 255, B: 0 };
const difference = colorDiff.diff(color1, color2);
console.log(difference);
Find Closest Color
This feature allows you to find the closest color from a given palette. The `closest` function takes a color object and a palette array, and returns the closest matching color from the palette.
const colorDiff = require('color-diff');
const palette = [
{ R: 255, G: 0, B: 0 },
{ R: 0, G: 255, B: 0 },
{ R: 0, G: 0, B: 255 }
];
const color = { R: 128, G: 128, B: 0 };
const closestColor = colorDiff.closest(color, palette);
console.log(closestColor);
Palette Reduction
This feature allows you to reduce a set of colors to a given palette. The `map_palette` function takes an array of colors and a palette, and returns a new array where each color is replaced by the closest color from the palette.
const colorDiff = require('color-diff');
const colors = [
{ R: 255, G: 0, B: 0 },
{ R: 0, G: 255, B: 0 },
{ R: 0, G: 0, B: 255 },
{ R: 128, G: 128, B: 0 }
];
const palette = [
{ R: 255, G: 0, B: 0 },
{ R: 0, G: 255, B: 0 }
];
const reducedColors = colorDiff.map_palette(colors, palette);
console.log(reducedColors);
The 'color' package provides a wide range of color manipulation and conversion utilities. It supports color conversion between different formats (RGB, HSL, etc.), color manipulation (lightening, darkening), and more. Compared to color-diff, it offers more comprehensive color manipulation features but does not focus on color difference calculations.
Chroma.js is a powerful library for color conversions and color scales. It supports a variety of color spaces and provides utilities for color interpolation, color scales, and color manipulation. While it offers some color difference calculations, its primary focus is on color manipulation and visualization, making it more versatile than color-diff in those areas.
TinyColor is a small, fast library for color manipulation and conversion. It supports a variety of color formats and provides utilities for color blending, lightening, darkening, and more. Similar to the 'color' package, it offers extensive color manipulation features but does not specialize in color difference calculations like color-diff.
Implements the CIEDE2000 color difference algorithm, conversion between RGB and LAB color and mapping all colors in palette X to the closest color in palette Y based on the CIEDE2000 difference.
npm install color-diff --save
Are located in the test/
folder and are run by:
npm test
// CommonJS
const {
closest,
furthest,
diff,
mapPalette,
paletteMapKey,
rgbaToLab,
mapPaletteLab,
labPaletteMapKey,
} = require("color-diff");
// ESM
import {
closest,
furthest,
diff,
mapPalette,
paletteMapKey,
rgbaToLab,
mapPaletteLab,
labPaletteMapKey,
} from "color-diff";
Returns the closest color. The parameter bc is optional and is used as background color when the color and/or palette uses alpha channels.
const color = { R: 255, G: 1, B: 30 };
// red, green, blue
const palette = [ {R: 255, G: 0, B: 0 },
{R: 0, G: 255, B: 0 },
{R: 0, G: 0, B: 255} ];
closest(color, palette); // {R: 255, G: 0, B: 0 }, red
The result above is obvious, but diff.closest
could deal with more complicated
cases.
Returns the most different color. The parameter bc is optional and is used as background color when the color and/or palette uses alpha channels.
const color = { R: 255, G: 255, B: 255 };
// black, white
const palette = [ {R: 0, G: 0, B: 0 }, {R: 255, G: 255, B: 255 } ];
furthest(color, palette); // {R: 0, G: 0, B: 0 }, black
The result above is obvious, but diff.furthest
could deal with more
complicated cases.
Returns a mapping from the colors in palette1 to palette2.
Return the palette map key for the color, to be used with the result from mapPalette.
Returns the difference between the lab colors color1 and color2. The parameter bc is optional and is used as background color when one of the colors uses alpha channels.
Object
RGBAColor
is an object containing 4 properties: 'R', 'G', 'B', 'A', where 'A' is optional OR
'r', 'g', 'b', 'a', where 'a' is optional . Such as:
{ R: 255, G: 1, B: 0 }
There is an optional property 'A', which specifies the alpha channel between 0.0 and 1.0. If not present the color will be treated as fully opaque, i.e. A = 1.0.
Each RGBA-color is transformed into a RGB-color before being used to calculate the CIEDE2000 difference, using the specified background color (defaults to white).
Object
LabColor
is an object containing 3 properties 'L', 'a', 'b' such as:
{ L: 100, a: 0.005, b: -0.010 }
Array.<RGBAColor>
Color palette array which contains many RGBAColor
objects.
Markus Ekholm
3-clause BSD. For details see COPYING
.
1.4.0
FAQs
Implemets the CIEDE2000 color difference algorithm, conversion between RGB and LAB color and mapping all colors in palette X to the closest or most different color in palette Y based on the CIEDE2000 difference.
The npm package color-diff receives a total of 118,217 weekly downloads. As such, color-diff popularity was classified as popular.
We found that color-diff demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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