If you're looking for anime similar to Color Engineering, you might like these titles.
BLAME! is a very dark and abstract set of 6 shorts which are based on the manga by Tsutomu Nihei. The "story" (if it can be called that) revolves around a man named Killy: a human living amongst clones and androids. His task, it seems, is to collect things known as "net-genes", and to help find the remaining humans that may or may not exist.
The official music video for the song Tokyo OP from the album songline, by Quruli.