XYB
The XYB color space is not registered in Color by default
Properties
Name: xyb
White Point: D65 / 2˚
Coordinates:
| Name | Range* |
|---|---|
x | [-0.05, 0.05] |
y | [0.0, 0.845] |
b | [-0.45, 0.45] |
* Space is not bound to the range and is only used as a reference to define percentage inputs/outputs.
The sRGB gamut represented within the XYB color space.
XYB is a color space that was designed for use with the JPEG XL Image Coding System. It is an LMS-based color model inspired by the human visual system, facilitating perceptually uniform quantization. It uses a gamma of 3 for computationally efficient decoding.
Chroma/Luma Adjustments
Per the creator, the default subtracts the Y component from the B component which makes Y function as lightness and X and Y like Lab a and b. When X=Y=0, the color is achromatic. You may find other implementations do not do this only because it is not documented well.
Channel Aliases
| Channels | Aliases |
|---|---|
x | |
y | |
b |
Inputs
The XYB 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 --xyb:
color(--xyb x y b / a) // Color function
The string representation of the color object and the default string output use the color(--xyb x y b / a) form.
>>> Color("xyb", [0.0281, 0.48819, 0.01157])
color(--xyb 0.0281 0.48819 0.01157 / 1)
>>> Color("xyb", [0.01132, 0.64596, -0.10359]).to_string()
'color(--xyb 0.01132 0.64596 -0.10359)'
Registering
from coloraide import Color as Base
from coloraide.spaces.xyb import XYB
class Color(Base): ...
Color.register(XYB())