The closest official thing would be: https://memory-alpha.fandom.com/wiki/Star_Trek_Star_Fleet_Technical_Manual https://memory-alpha.fandom.com/wiki/Star_Trek_S

The closest official thing would be: https://memory-alpha.fandom.com/wiki/Star_Trek_Star_Fleet_Technical_Manual https://memory-alpha.fandom.com/wiki/Star_Trek_Star_Fleet_Te... It contains design guides, fonts, proper use of insignia, etc.