I visit family in other states and I get comments like “I can’t believe you are so thin.” For context I am a healthy weight and I eat what I consider a reasonable diet. I sit and smile while I watch them drink soda and eat pure sugar and salt. I don’t care about your life choices but don’t act surprised by someone that’s a normal weight.
I first got this realization when I started using grey scale mode for my phone at night. A “good to bad” scale in an app became unintelligible. Since then I try to consider colorblindness if I design stuff myself. It’s fantastic if color scales carry meaning in both their colour but also the same meaning in their lightness, so everyone can understand them the same.