The references in KotOR are all well and good, but the actual armors tend to miss the mark when it comes to a lore-friendly appearance. To that point I attempt to do the following that I haven't seen attempted:
Ulic Qel-Droma's mesh suit gets a new color scheme. Cover art aside, Ulic sticks with blue/red and grey/brown for primary and secondary colors.
Exar Kun's Light Battle Suit also needs recolored. I'm leaning towards black and purple on this one, but I'll have to see how it looks in practice.
Cassus Fett's Battle Armor just takes what was the Mandalorian Heavy Armor texture. Honestly it's so close to his comics appearance I wonder if that was the original intention.