You get the gist! My first idea was to make a contrast between the characters. But I tried to test with the environment and the problem is that you know, it's darkness basement. :) The brown hair blends into the background. So... I started to animate curls and parallel fix some spots and problems. I don't know currently about the final color, but you highlighted a good point. I really appreciate it, thank you. :)
Viewing post in Betty rework (in next update 4) comments
Yeah, I get why you want to make her have lighter hair too, since the background is also dark colored. That makes a whole lot of sense to me. Well, one way to make her have more contrast to Ashley would be to give her bigger boobs, since they're about the same size at the moment, although Betty's seem a little bigger, so that might already be what you were aiming for.