I decided to re-paint one of the boards I use as a photo backdrop. One side was a streaky turquoise, which I quite liked but was a bit too dark, and the other side was a dark murky olive green that I didn't ever use. So I wanted to lighten up the turquoise a bit, and paint the other side a colour that I would find more useful.
On the turquoise side I just gave it a quick coat of duck egg blue. On the olive side, I covered it with cream first, then painted it pink. The pink was a bit too bright, so I gave it another coat of pink mixed with white. It can look pink or peach in photographs depending on the light.
Finally I painted a piece of foam board with stone-effect paint.