LAB D50

The Lab D50 color space is registered in Color by default

Properties

Name: lab

White Point: D50 / 2˚

Coordinates:

Name	Range^*
`l`	[0, 100]
`a`	[-125, 125]
`b`	[-125, 125]

^* Space is not bound to the range and is only used as a reference to define percentage inputs/outputs in relation to the Display P3 color space.

CIELab D50 3D — The sRGB gamut represented within the CIELab D50 color space.

The CIELab color space also referred to as L*a*b* is a color space defined by the International Commission on Illumination (abbreviated CIE) in 1976. It expresses color as three values: L* for perceptual lightness, and a* and b* for the four unique colors of human vision: red, green, blue, and yellow. CIELab was intended as a perceptually uniform space, where a given numerical change corresponds to similar perceived change in color. While the CIELab space is not truly perceptually uniform, it nevertheless is useful in industry for detecting small differences in color.

Learn about CIELab

Channel Aliases

Channels	Aliases
`l`	`lightness`
`a`
`b`

Input/Output

Parsed input and string output formats support all valid CSS forms. In addition, we also allow the color() function format using the custom name --lab:

lab(l a b / a)          // Lab function
color(--lab l a b / a)  // Color function

When manually creating a color via raw data or specifying a color space as a parameter in a function, the color space name is always used:

Color("lab", [0, 0, 0], 1)

The string representation of the color object will always default to the color(--lab l a b / a) form, but the default string output will be the lab(l a b / a) form.

>>> Color("lab", [54.291, 80.805, 69.891])
color(--lab 54.291 80.805 69.891 / 1)
>>> Color("lab", [75.59, 27.516, 79.121]).to_string()
'lab(75.59 27.516 79.121)'
>>> Color("lab", [97.607, -15.75, 93.394]).to_string(percent=True)
'lab(97.607% -12.6% 74.715%)'
>>> Color("lab", [46.278, -47.552, 48.586]).to_string(color=True)
'color(--lab 46.278 -47.552 48.586)'

Registering

from coloraide import Color as Base
from coloraide.spaces.lab import Lab

class Color(Base): ...

Color.register(Lab())