Hey, Danny's colour was selected before the feature to hide the textbox was implemented so I never picked up on that - yeah, it's definitely too dark. I'll fix that!
As for the hairstyles, I have experimented a lot with that, as well as showing samples to a lot of players on discord, but generally it doesn't really work, unfortunately. The hair is a large part of the visual identity on these semi-anime-style characters, and they just look like totally different people with different hairstyles. Having said that, there are a few hair changes planned from time to time, like with Sarah in the latest update, or Catherine when she ties her hair up.