With the exception of the Tundra space center and squad parts, the textures are different and the way they deal with the textures and colors are different so they probably are never going to match (you can see this with the road pieces). However, the color that I have found that closely matches the Parallax KSC terrain is R=0.41657, G=0.42167, B=0.31458, and Alpha=1. You will have to keep changing the launch pads back to those colors every time you quit the game as they don't save for some reason, but everything else will be saved.