The cyan one I made because I liked the background more aesthetically, but the gray before seemed to fit better for the "colorblindness" theme.

The red one I really almost went with because when I showed it to my friends, they had a real struggle finding the question mark, which is closer to evoking the correct feeling for them. I wound up keeping the gray background anyway though because I wanted it to emulate the reveal of something new to them while keeping things the same for me rather than the actual feeling of viewing the painting.