Hunter Lab

The Hunter Lab color space is not registered in Color by default

Properties

Name: hunter-lab

White Point: D65 / 2˚

Coordinates:

Name	Range
`l`	[0, 100]
`a`	[-210, 210]
`b`	[-210, 210]

^* 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.

oRGB — Figure 1. The sRGB gamut represented within the Hunter Lab color space.

The Hunter Lab color space, defined in 1948 by Richard S. Hunter, is another color space referred to as "Lab". Like CIELab, it was also designed to be computed via simple formulas from the CIE XYZ space, but to be more perceptually uniform than CIE XYZ. Hunter named his coordinates L, a, and b. The CIE named the coordinates for CIELab as L, a, b* to distinguish them from Hunter's coordinates.

Learn more.

Channel Aliases

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

Input/Output

The Hunter Lab space is not currently supported in the CSS spec, the parsed input and string output formats use the color() function format using the custom name --hunter-lab:

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

The string representation of the color object and the default string output use the color(--hunter-lab l a b / a) form.

>>> Color("hunter-lab", [46.113, 82.672, 28.408])
color(--hunter-lab 46.113 82.672 28.408 / 1)
>>> Color("hunter-lab", [69.407, 23.266, 40.946]).to_string()
'color(--hunter-lab 69.407 23.266 40.946)'

Registering

from coloraide import Color as Base
from coloraide.spaces.hunter_lab import HunterLab

class Color(Base): ...

Color.register(HunterLab())