I am painting the exterior of my home. It is a ranch style house in South Florida. The house is currently white with 3 panels of dark gray stones of the front of the house and a white flat tile roof. The stones were created from stucco and are not the real thing. I would like to change the stones to a lighter color and would like them to look more like stone. Do you have any suggestions? If I can't change the stones, what colors do you suggest for exterior paint. Thanks for any help.