Closed
Description
Lab and LCH colors can be outside the sRGB gamut. https://www.w3.org/TR/css-color-4/#specifying-lab-lch says nothing about how to render those colors, other than not clamping lightness.
There is text about how to convert lab/lch to sRGB, so implementors may take this to mean that lab/lch should be converted to sRGB for rendering, but UAs that wish to support extended color rendering may choose to map lab/lch into some other working colorspace. I think the spec should make this clearer. Maybe #300 needs to be resolved before that happens.