Originally uploaded by Cate Ross.
Here I've used wet washes for grass--the watercolor set I'm using has only 5 colors--red, blue, green, yellow and black, so the different greens are just different mixes. I've also mixed up a brown for the left hand roofs and windows--they are a bit too sharply painted, I think. The brush was practically dry, but it's easy to get too much water on a small painting like this.
I've also added a black/gray roof to the right, and added shadows and dark green to the base of the buildings.