Bluman is a GTK theme meant to be an uncreative drop in blue replacement for the default Human themes in Ubuntu 7.10 and 8.04.
I've include a gtk-theme for Ubuntu 7.10 and another with the Murrina style used in Ubuntu 8.04-beta. Also included is a set of matching blue human style icons and backgrounds. (See other Bluman submissions.)
I've constructed this theme by color transforming the default files with Perl scripts. So I could in principle extend this batch of files to include other system files (like a gdm-theme) or other colors (like green) should there be interest in such things.