Have you ever experienced a person is describing their product and say, “You can skin it however you want!”
I hate when people do this. It’s an obvious assumption that the only thing one might want to do is change the color of the button or text. Here is why it’s a mess:
The structure is important. You can’t just stick a skin on a fish and make it a bird. How it works is always more important than how it looks.
If your customization screens have places to pick hex colors, then you are not going far enough.