I've wanted to do this kind of design for a while now, and picked this week to do it because of this week's challenge theme - Ugly Bug Ball! These are supposed to be butterfly-wing nails. Not sure how much they look like wings! This was quite a complicated design to try and replicate and I don't know if I've done it very well :-S
I started off by creating a three-colour gradient. Over a base of white, I sponged on purple (Barry M Prickly Pear) blue (Barry M Blueberry) and green (W7 Spearmint). Here's the gradient on it's own - I like how subtle it looked and nearly didn't add anything to it!
The butterfly-wing design is created by (obviously) using the Barry M black + white pens, and a coat of Claire's holo glitter over the top.