Sometimes inspiration comes when you least expect it. In my spare time I have been painting again (one of my resolutions!) but have been a little stumped as what to do. I found a lot of my old sketches from past lithography prints and decided to start from there. Color was another roadblock but I couldn't help but notice the color of my water after painting for a little bit. It was the perfect violet swirl with a bit of iridescence thrown in.
Daniel Smith makes the best paint and ink I've ever used. They also have an entire line of "Luminescent" waters colors (here). I've used them for years and always enjoy getting their catalogs in the mail :)