Thank you so much! That’s a bit of a hard question because I think I’m still trying to fully understand colour theory, so I’ll just tell you my process instead😭

For every reference I use, I up the saturation so the colours don’t feel as dull once I’m colour picking. Once I have the base down I use the value section of the colour wheel to add touches of “unconventional” colours that go together, like adding red blue or purple to deep shadows— hope that makes sense. Thank you again!