There will be times when you need to make use of color and you need to manipulate color. If that happens, you need to discover the color families. The contrasting colors will draw attention to the many architectural details and the extreme contrasts will clash and these will detract from details. If you want to be on the safe side then you can go for and use the single color family. If you are looking for accents, then you can try and use the darker or the lighter shade instead of the different color.