Between this and the relative color syntax, looks like much cleverer theming options are on the way, yay for more control for end users. For anyone discovering APCA, aside from it giving better results, I’ve also found it super interesting to read about the logic behind the algorithm. The Easy Intro mentioned in the article (<a href="https://git.apcacontrast.com/documentation/APCAeasyIntro" rel="nofollow">https://git.apcacontrast.com/documentation/APCAeasyIntro</a>) is well worth the time and it has all the relevant follow-up resources.