Linear ProPhoto

The Linear ProPhoto color space is registered in Color by default

Properties

Name: prophoto-rgb-linear

White Point: D50 / 2˚

Coordinates:

Name	Range^*
`r`	[0, 1]
`g`	[0, 1]
`b`	[0, 1]

^* Range denotes in gamut colors, but the color space supports an extended range beyond the gamut.

Figure 1. CIE 1931 xy Chromaticity – ProPhoto RGB Chromaticities

The Linear ProPhoto space is the same as ProPhoto except that the transfer function is linear-light (there is no gamma-encoding).

Learn about ProPhoto

Channel Aliases

Channels	Aliases
`r`	`red`
`g`	`green`
`b`	`blue`

Input/Output

Linear ProPhoto is not supported via the CSS spec and the parser input and string output only supports the color() function format using the custom name --prophoto-rgb-linear:

color(--prophoto-rgb-linear r g 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("prophoto-rgb-linear", [0, 0, 0], 1)

The string representation of the color object and the default string output will be in the color(--prophoto-rgb-linear r g b / a) form.

>>> Color("prophoto-rgb-linear", [0.52928, 0.09837, 0.01688])
color(--prophoto-rgb-linear 0.52928 0.09837 0.01688 / 1)
>>> Color("prophoto-rgb-linear", [0.6535, 0.42702, 0.06115]).to_string()
'color(--prophoto-rgb-linear 0.6535 0.42702 0.06115)'

Registering

from coloraide import Color as Base
from coloraide.spaces.prophoto_rgb_linear import ProPhotoRGBLinear

class Color(Base): ...

Color.register(ProPhotoRGBLinear())