Function Signature

js

rgbToXyz(r: number, g: number, b: number): { X: number, Y: number, Z: number }

Parameters

r (number): Red channel value (0–255).
g (number): Green channel value (0–255).
b (number): Blue channel value (0–255).

Return Value

An object containing the XYZ tristimulus values, scaled to the D65 reference white:

js

{ X: number, Y: number, Z: number }

Examples

js

rgbToXyz(255, 102, 0);
// { X: ~48.4, Y: ~30.3, Z: ~4.0 }

rgbToXyz(0, 170, 255);
// { X: ~35.8, Y: ~41.4, Z: ~98.5 }

rgbToXyz(255, 255, 255);
// { X: ~95.0, Y: 100.0, Z: ~108.9 }

rgbToXyz(0, 0, 0);
// { X: 0, Y: 0, Z: 0 }

Conversion Details

Uses the sRGB color space as input with gamma correction (srgbToLinear).
Conversion is performed relative to the D65 reference white (Xn=95.047, Yn=100.0, Zn=108.883).
Output values are scaled by 100 for compatibility with Lab conversion.

Usage Notes

Often used internally by rgbToLab before conversion to the Lab color space.
XYZ is device-independent and serves as a standardized color reference.
Output values may include decimals and are not clamped to integers.