Yea my inventory tats did this once, when I had them dyed black... for some reason my black head peice changed color all of a sudden back to the origional yellow color in my inventory.
It did both me a bit since my black head peice at that time was Smite, whereas my yellow one was heal..
if i quickly log out then sign back in... it'll show my Ascetic armor as the default colour... even tho i have them fully dyed black... it's very annoying for me as i'm all about the looks :P
Mine sometimes comes up on the char selection screen as blue tats...my other 3 chars often come up as the default color also though, but if I wait a few seconds (usually no more than 3-4 seconds) it clears up and all my armous/tats look correct