[@The Wyrm] Blue (turquoise) & Gold, mentioned it briefly in the opening IC post.

EDIT: For future reference, byzantine colors are very bright. You'll see a lot of reds, oranges, whites, blues, purples, yellows, etc. Historically this was a sign of wealth/strength for the Empire, as bright colors weren't easy to manufacture in high quantities and the dyes used were prized by the wealthy elite, so to have an entire army displaying these rich colors was quite impressive.