It's pretty simple, which isn't exactly a bad thing. However, with something so simple, it has no reason to have more than a few colors. There doesn't need to be more than two colors for anything, so the shirt, the hair, and the skin, etc. should only be a single color or two at most. I'd also brighten up the colors so things pop more, because at the moment her clothes look like they're kind of the same thing when zoomed in.