The tablist colour feature is currently broken on creative hence why it doesn't work. The feature would normally show up your name in the colour of your chat prefix (& in the case of staff, show the rank too). I'll get this fixed on our test server later today / tomorrow along with a lot of other updates that I've been testing ready to deploy, and get it onto the main server as soon as I can.
Sorry for the issues of this not having been applied as it were meant to have been - I've also set your rank on the website to iron.
Need support quickly? Please email [email protected]