The porcelain thing reminded of Sigvalds wives, which he used to skin and encase in porcelain when they would go old and their skin start to wrinkle, so they remain perfect forever
As one friend of mine said - why not use basic Marine schemes for reference? You can have red/yellow/green/blue/white - all of these (mostly) do not belong to original Stormcast colors. Or you can add something more specific, like Nightlords lightning effects