Yep - I think they are yellow. I used to work for the guy who started all the "vanity" license plates. The original vanity tag was to honor and remember the 7 astronauts from the 28 Jan. 1986 Challenger accident. From there all kinds of interest groups jumped on it - we have all the college tags, florida panther, mosquito lagoon, manatee, right to life, etc.
I would like to see a confederate florida tag - I made my own with a little square CBF sticker on the corner of mine!
I don't know if TN has a SCV tag or not. Like you I have my own. A Bonnie Blue front plate. Most yahoos think it's for Texas...LOL. There are a fair number of Stars and Bars too. The Battle Flag gets less play unless accompanied by a gunrack...lol.
Thanks for the ping...