@Ubertron: I've been working on a LESS-like program in Java called DSS. It's similar, but not identical because when I started writing it, I hadn't discovered any of the other frameworks yet. In case anyone is interested, it's at http://github.com/silentmatt/dss . Personally, I like it better because it avoids some syntactical ambiguities that LESS runs into. Unfortunately, it doesn't do color calculations (yet).