So I committed “Thread Necromancy” (Sorry Luke) and posted on an old thread from 09. Anyway, I think the post is still valid, but I’ll create a new thread just to stay within the rules.
So the question was “Where can I find a cloak color index or other such list for my guards?”
Anyway, I had the same conundrum and after scouring Google, I arrived here.
http://en.wikipedia.org/wiki/List_of_Crayola_crayon_colors
This Wiki really helped get the creative juices flowing because it gave me a quick an spacious list of visual color references.
Admittedly, a few of the colors are a bit out-there (i.e. Atomic Tangerine and Banana Mania) but still having the large color sheet helped me a lot.
Good luck!