For the birdhouse, I first layed in a very weak wash of a mix of ruby red and indian yellow for the front side. The roof and side are relatively on the shadow side and I layed in a very weak wash of a mix of paynes grey and a touch of grey which I mixed for the bg. After this has dried thoroughly, I drybrushed (color with very little water dragged on dry paper) with a mix of ruby red and the premixed grey. On top of this I layed in patches of yellow green and a weak mauve.
Watercolor Journal 