This exercise was pre-CRT-influenced anti-racism, though.

I'm not sure how sharing this would make any difference. You could love this example and still hate CRT, and how people use ideas from CRT to influence classroom instruction.

Indeed, you could argue that this was an anti-CRT exercise because--from what I understand--after the exercise, everyone took off their greens and purples and things were color-blind again which felt like how things should be.

CRT advocates for centering race, i.e. color-awareness, and the return to purple-green blindness is exactly the opposite lesson.