As envisioned earlier, red robes on the magos dominus and white for the archmagos. I also decided to take a whack at reversing the gold/silver on them as well, with the archmagos being predominately gold with silver trim to go along with the white robes. Still a ways to go yet, but so far, so good!
In other news I'm due to get my main cogitator back at the end of the week, praise be unto the Omnissiah!