Similarly the February colour challenge at My Sketch World is to use any four of eight colours; there's a wide range, but they include both red and green.
The next set of photos for my 2011 album was a pair of autumnal pictures, and the stripey paper that I had already paired with them contained many of the required colours. Happy coincidence indeed. I just needed to add some red via my tag and my title letters. To be honest, the title may well have ended up being brown without the challenge, but I'm very pleased with the look of the red.
I also used Sketch #4 from My Sketch World's 6th Birthday Sketch-a-Thon. Three challenges in one:
Paper - Glitz Design Laced with Grace, Crate Paper Little Sprout, Basic Grey Mellow Equinox, EK Success Cream Linen
Letters - Basic Grey Curio
Ink - Papermania