I've been doing a lot of work with Triads lately - mainly in preparation for the class I am teaching at Valley Ridge (and yeah, we still have a few extra spots if you want to jump in, call Kathy).
I work with Triads a lot as I love to mix all my own paints rather than rely on what comes out of the tube. Obviously I used a lot of white here too and pencil and collage and Wood Icing for the texture. No black though (except pencil), I simply wasn't in the mood on the day I painted these. I was trying to harness the feeling of Spring.