I tend to see a strong white element in classic dwarves not only because of their associations with stone but with their adherence to tradition, closeness to hearth and clan, their sense of preserving tradition, and creating kingdoms. Fantasy dwarves build ancient citadels in mountains and tend to fortify them, making them last for a long, long time - sounds pretty white to me. When they emerge to fight, they're full of vigour and roaring and chanting and are pretty red when on the offensive. While gnomes have horned in on their space as engineers, in most other fantasy universes I think that dwarves still get the best of engineering for both red (they get the creative, forging, and steam powered aspects) and white (they get impressive architecture, enduring citadels, and clever tactics and traps). There's also a blue element in how dwarves often have secrets for forging (either through a technique or a material) and the whole "ancient, buried, and forget secrets" schtick leaves dwarves feeling very
to me.
I think magic could shake up dwarves a bit by playing them up as
aescetics. I think a race of fantastic weaponsmiths with centuries-long lifespans living in mountain fortresses has some appeal. I would like to see them played up as knowing some really old secrets, the things the others all forgot but they remembered because of their ancient traditions. In fitting with their colour combo, they'd be a more defensive play style involving tricking your opponents into attacking you at the wrong time, reflecting a sort of "aloof from the world's affairs" view.
Probably not the most fun play style I'll admit, but I think there are aspects to dwarves beyond ale and smithing that could also be explored.