There's also his voice.
Or the piss yellow color scheme.
It's gold!
Actually scratch what they said on the panel, the original design decision behind the color scheme was because on their way to emulate a neo-renaissance they ended up with a baroque.(Note the clothing texture designs with the intricate, organic, curvilinear, decorations) For the scheme they went with a tenebrism's style (Caravaggio) with a high contrast of dark and light.
All this from the art director's mouth, IIRC.