willow green for grass
grass, nile, and emarald green for trees
flesh blush and brick red for colorful trees
buff and a couple of diff warm grays for site elements
cool gray #5 for shadows
a blue for water
Then I have a bunch of pencils that I color over with.
I switched to Copic Sketch Markers per Richard Scotts graphic workshops found at www.graphicsteacher.com
They have changed my coloring abilities forever and are awesome. You should check them out sometime.