Call me weird, but what do you think about painting their armor a "bone/white" color? You could leave the armor on the stomach red, trim the shields in gold with the "claw marks" the same red as the stomach on top of a "bone/white" field/shield.
I don't know about the chain mail color...

... gold maybe? If anyone was to have gold chain mail, it would be a Dwarf. And in my mind the paint scheme would fit the Bloodbone Dwarves. It would look kinda (in my mind) "elite" as if they were the best of the best.
You know, you gotta believe your one bad "mutha" to go onto a battlefield with numerous armored enemies armed only with a claw and a shield. I mean that kind of "badness" reminds me of the great...
"To be tha Man, you gotta beat tha Man, and brotha...you ain't tha man." -RICK FLAIR

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