Many of these colors are great choices, but I believe some of these are already taken, or closely resemble one that was taken by another title.
In order of suggestion:
Gold may be free. I'm not sure, but I believe the Master title has yellow, so it might look similar.
Black and white are taken by Warrior and Princess respectively.
Baby puke green....probably not the best choice....of words. Also, Goblin has a similar green.
Purple is taken by King.
Sea green looks just like aqua which I believe is taken by the Lady title.
Crimson red would be similar to the red team color, unless the title could alternate colors between teams?
Dark gold orange sounds like what Emperor used to be for that title got changed.
Midnight blue looks similar to the Prince title color.
I chose Lime and Magenta because not only are they strong colors on both teams, but I also don't recall them being taken by another title.
(Closest to lime seems to be the Goblin green. Closest to Magenta seems to be the Queen's Pink and King's Purple. Correct me if I am wrong.)
As more expensive titles are being used, will the cheaper ones get their colors changed? If yes, this would be much easier.
With many titles used these days, I think a chart connecting each color to its corresponding title would help decide on potential colors in the future.