Not sure if it ever got mentioned in a dev video or something.
Nevermind.
Just for the record, there was a line in the Dothane Signature Character store, The Bait, that reads as follows: "He rose from his tall hexagonal chair, the soft luminance of his hair and skin going with him, his bare feet bathing the obsidian floor in a golden hue."
So Khazas is a golden color and glows.