According to Sune Foldager:
relating to syntax is also in the view menu etc. Putting it all in a prefs window is not much better: It takes longer time to change, and many people will check the menus first to see if it is not considered "deep" enough to end up in the prefs, I think.
You cannot change the syntax highliting colours w/o manually editing the bundle file. I'm afraid I don't think it is a good thing.
I like to have light background and to modify it, I have to find the hexcode for every colour I want to change and restart TM.
It is a bit too cumbersome.
Ollivier #63 :-)