Here's a little tidbit for you. The guard/knight uniform's accent colors depend on rank. The lowest tier has brown accents. Most knights do not move past the first rank. The second tier has blue accents, and the third tier has white accents along with the the option to wear whatever they like.
Another little bit of information that you'll never actually hear within the story, is that Bisque there was asked to move up one rank earlier that day. He turned down the opportunity.