So I have found a love of pan pastels! (available at http://www.craftyboots.com/ourshop/cat_581196-Pan-Pastels.html)
I used the pan pastel sponge with violet and starting in the middle of a white card swept out to the edges in a swirl pattern.
I then went over this in turquoise using the same technique.
To finish the card I used a Some Odd Girl stamp, a frame and butterflies cut with a cuttlebug and a few random embellishments.