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CIE XYZ

All values are between 0 and 1. XYZ is only defined within the constraints of a color space and reference white point of a standard illuminant. If one is not given, sRGB and D65 are used as the color space and standard illuminant.

  • X = mix of three CIE RGB curves chosen to be non-negative
  • Y = luminance
  • Z = quasi-equal to blue

It is not often useful to convert to XYZ, as XYZ defines real-world light and is typically then converted to a digital representation (most commonly RGB), but the functionality is present nonetheless.

When converting to most color types, you must supply color space and standard illuminant reference white. See available Color Spaces and Stardard Illuminants.

New Color​

Color.from('xyz', [x, y, z])

Conversion to​

.to('xyz',{
  colorSpace: string,    // optional, default = 'srgb' -- ignored if converting from xyy, lab, luv
  referenceWhite: string // optional, default = 'd65'  -- ignored if converting from xyy
})

Get methods​

.getX(): number
.getY(): number
.getZ(): number

JavaScript​

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

const color1 = Color.from('xyz', [0.5928939, 0.2848479, 0.969638])
const color3 = color2.to('xyz')

const color4 = color1.to('rgb')
const color5 = color1.to('rgb', {
  colorSpace: 'adobergb',
  referenceWhite: 'd50',
})

TypeScript​

import Color from 'chromaticity-color-utilities'

const c: Color.xyz = Color.from('xyz', [0.5928939, 0.2848479, 0.969638])