As you might have heard browsers are now starting to adopt JPEG-XL as a standard.
Now I read that JPEG-XL prefers to use the XYB color space, which GMIC has no (named) conversion routine for as far as I see.
However, it seems the color matrix is rather simple.
Link to wikipedia on the simple matrix of XYB to LMS (long, medium, short representing the response curve of the eye’s cones): LMS color space - Wikipedia
I also read that old jpeg also can benefit from the XYB color space incidentally.
Should be easy co add a conversion command for it no? Not that there aren’t a ton of color spaces already, when will it stop eh? So you guys decide, to add or not to add.