Red: Command Division
Gold: Operations Division
Blue: Sciences Division
Green: Medical Division
Yellow: Engineering Division
Purple: Security Division
These colors are often combined with other colors to denote specific areas of specialization within a division. For example, in the Sciences Division, astrophysicists wear a light blue shirt, while biologists wear a dark blue shirt.
In addition to the primary color divisions, there are also a number of other colors that are used for specific roles or positions. These include:
White: Admirals and other high-ranking officers
Black: Special Forces and covert operations personnel
Gray: Civilian personnel and non-Starfleet personnel
The use of different colored shirts in Star Trek helps to create a visually appealing and distinctive appearance for the show, while also providing a way to quickly identify the role or division of a character.