I generally don’t do anything front-end if I can help it, but I’ll get my hands dirty when I need to. I recently played with a number of different K2 stylesheets and the newer Thematic framework while redesigning this site. I could only find one child theme that I really liked for Thematic, which was Second to None, but I wanted a dark version, so I set to work trying to interpret his stylesheet and inverted all of the background and text colours (as a starting point). This probably sounds easier than it is with the complexity of stylesheets today. At any rate, I eventually gave up when I realised that all of the icons looked funny in this inverted scheme, but I thought I’d share the Hex Colour picking tool that I found when bumbling through this, as I would have been lost with out it.