Star Trek 50th Anniversary Delta Blue T-ShirtShow you're a proud graduate of Starfleet Academy wearing this fun Star Trek t shirt! The Star Trek 50th Anniversary Delta Blue T-Shirt is blue, the color worn by science and medical officers aboard the USS Enterprise. It features a large image of the gold badge emblem for Starfleet in the Star Trek universe. A black number "50" is embedded within the "delta shield" to celebrate the 50th anniversary of the pioneering Star Trek TV series. "Space: the final frontier!"