Color utilities for Node.js.

Conversion, modification, and color schemes of: RGB (at any bit depth), HSV, HSL, HSI, HSP, CYMK, YIQ, XYZ, xyY, L*a*b*, L*u*v*, Y'PbPr, Y'CbCr, and more.

npm i chromaticity-color-utilities

📖 Please read the full Documentation for details on each method as well as numerous usage examples.

import Color from 'chromaticity-color-utilities'

const color1: Color.hsv = Color.from('rgb', [255, 128, 0]).to('hsv')

const scheme1: Color.lab[] = Color.from('hex', 0x9a237f)
  .modify('desaturate', { amount: 0.2 })
  .to('lab', {
    colorSpace: 'AdobeRGB',
    referenceWhite: 'D50',
  })
  .scheme('gradient', {
    with: Color.from('hsl', [300, 50, 45]),
    colors: 5,
  })

const yourMethod = (rgb: Color.rgb): Color.hsv => {
  // do things
  let hsv: Color.hsv = rgb.to('hsv')
  // do things
  return hsv
}

const Color = require('chromaticity-color-utilities')

const color1 = Color.from('rgb', [255, 128, 0]).to('hsv')

const scheme1 = Color.from('hex', 0x9a237f)
  .modify('desaturate', { amount: 0.2 })
  .to('lab', {
    colorSpace: 'AdobeRGB',
    referenceWhite: 'D50',
  })
  .scheme('gradient', {
    with: Color.from('hsl', [300, 50, 45]),
    colors: 5,
  })

colorTypes is still supported, but deprecated and will be removed in a future release.

import Color, { colorTypes } from 'chromaticity-color-utilities'

const color1: colorTypes.hsv = Color.from('rgb', [255, 128, 0]).to('hsv')

• YCbCr validates only with a high tolerance. Not sure if floating point issue.

git clone https://github.com/reiniiriarios/chromaticity-color-utilities.git
cd chromaticity-color-utilities
npm ci
tsc

(Typescript not added as dependency, install with npm i -g typescript.)

• LCHab - basic support added
• LCHuv
• HSLuv
• HPLuv
• YUV
• Gamma adjustment modification
• Auto-gamma adjustment and conversion for rec709, rec2020, and jpeg to/from ypbpr
  • note to self: rec709 does gamma conversion before while rec2020 does gamma conversion after when converting to ypbpr (I think)
• Need way more comments and better variable names
• Write more documentation wrt mathematics.
• Integrate my references better. :)
• For RGBA to CMYK, mix alpha with white
• Support for 8-digit hex values (RRGGBBAA)
• Diagrams in docs