I think I am just about there on the roof colour. Starting with a basecoat of Anita Rust Red, I washed over a thin coat of Anita Chocolate Brown. I then shaded under the shingle lines with Anita Hunter Green watered down. Since taking this photo I have also highlighted the upper edge of the shingle line with Games Workshop Foundation paint in a light red. I picked out the line of fishscale shingles in watery Hunter Green.
As you can see, despite best efforts, I have managed to get quite a bit of paint onto my blue trim, so the next job is to go back and touch up the blue and green paintwork.