Many characters have appeared in two colors.
Examples:
Red and Gold
- Worf -- entire seasons in each
- La Forge -- entire seasons in each
- Data -- red in several episodes, e.g. "Future Imperfect"
- Wesley Crusher -- yellow in "Parallels"
- O'Brien -- red in first season
- Sito JaxaSito Jaxa -- cadet red and security
- Thomas Riker -- red in "Defiant"
Red and Blue
- Picard -- blue in "Tapestry"
- Dr. Crusher -- red in "All Good Things"
Red and gold are pretty common and blue is harder to collect.
Has any character ever appeared in all three colors?
(or even the unlikely gold/blue combination for that matter)?
Clarification: For characters that appeared in different uniform generations, colors are interpreted as equivalent if the color change was due to changes in uniforms. For example, TOS-era command gold and TNG-era command red count as the same. There were widely varying uniforms and colors in the various TOS-era films.