Explore a constant-lightness plane of OKLab (which includes out of gamut colors, and indeed imaginary colors), mapped to sRGB using (on the left) the proposed new CSS Color 4 GMA which operates in OKLCH with detaEOK and avoids un-needed deltaE calls.
Compared to (on the right) current color.js gamut mapping algorithm, which operates in CIE LCH with deltaE 2000.
Lightness: 0.50