I had an embarrassing moment like that at work once, a co-worker (supervisor level) charged some turmeric as ginger, and I teased him about it, “how can you miss that it’s bright orange?!?” Turns out he was completely color blind, and no one there knew except the head manager in the dept. I was apologizing to him for the whole day and felt awful, but all of a sudden a lot of his idiosyncrasies made sense... he didn’t read all the plu’s because he didn’t know them, but because he couldn’t see the color differences in the items to tell a Granny Smith apple from a red delicious. My uncle is also color blind, so you would think I would be more aware!