If you want to change the colors, at the beginning/midway, create a new layer and then apply image. Play around with the layer modes like soft light, color dodge, etc., and when you find one that creates a color you like leave it. Then mess with opacity, erase around areas you don't like the new color scheme, and then you'll have some diversity.

I typically start off on stock tags with an applies image -> soft light w/erasing in order to create some diversity in colors/add the early part of a light source if the stock is good enough.