Excellent!

There are a lot of things that you will teach us. Including the YCrCb (which I barely remember reading about before).

About the "PX rubbish": The resources page says: ">>> Size in pixels considering a 1366px large screen and 16px as root font size. It is up to you to make it adjustable.".

I REALLY care about spreading the accessibility mindset. That is way more important than just having a clearer code.