When Seven of Nine did wear a Starfleet uniform in Voyager season 5, episode 24, "Relativity", and in Voyager season 7, episode 17, "Human Error", it was science blue.

Seven of Nine would remain on "Star Trek: Voyager" through the end of the series, which went off the air in 2001. Ryan would reprise her role in "Star Trek: Picard" in 2020, appearing in all three ...