Hi Vanessa; glad you’re having success with the colored pencil techniques. You have a good eye! I do use a cream pencil combined with peach on almost all buildings and hardscape at the very beginning of coloring a drawing, then wash over them with whatever color will best depict the material I’m envisioning…terra cotta, slate blue. etc. The cream and peach give a bright “undercoat” that ties it all together and “shines through,” much like working with watercolor. Then I will come back with darker pencils (lavender, aquamarine, carmine red) for a quick diagonal trace to liven things up. It sounds like a lot of effort, but because I work very small it goes very quickly.