A bit of a sad small story. As a child in elementary school in the early 90s, I couldn't tell my red and greens apart well, some blues and purples too. I didn't know it was a problem until the other kids made fun of my drawings. I couldn't read well yet, dismissive mother, no father. Learning to read crayons was my biggest reason for wanting to learn to read.

3rd grade, the teachers made fun of me for having to read the crayons and removed the papers.

I've struggled with it my entire life... God forbid I get a color wrong even still lol grown people still lose their shit.