Hi Kyle,
When I started doing some research into this costume, I messaged @Cookiedala for some advice, she mentioned this about color:
" I would really go for a charcoal grey (almost black!) color and weather slightly on that."
I would agree that a dark grey is the way to go with the capes and suit and leave the boots, gloves, and forearm bracers to be black.
I know we will be getting some additional looks at this character in Tales of the Empire which releases May 4 and I just learned that there will be a limited series of comic books on the Inquisitors releasing in July! I am hoping we can get some additional images and hopefully a name/number for this Inquisitor in the comics. I am holding off starting my own Research/WIP thread until after those two new resources come out.
I am excited to see that you are working on this costume!