What is the reason for the different colored shirts worn by Star Trek's crew instead of one color uniform? Did they ever switch to using the uniforms from The Next Generation (TNG)
Men's Star Trek Shirt Color Rankings: Command, Science, Expendable T-shirt - Athletic Heather - Medium : Target
![object identification - "Star Trek: Discovery" Uniforms: what is the meaning of their colors? - Science Fiction & Fantasy Stack Exchange object identification - "Star Trek: Discovery" Uniforms: what is the meaning of their colors? - Science Fiction & Fantasy Stack Exchange](https://i.stack.imgur.com/foPAi.jpg)