The nice thing about grey/silver/neutral colored things is that when you light them with color LED lighting, they are whatever color you light them.
This Necron Warrior is sliver with pale gold accents, and the spaceship he is in is shades of grey. Green and blue lighting set the mood, and a bit of purple help seperate the Necron warrior from the background. The green on the eyes and gun that glow under the blue light are a happy accident I'm glad to take advantage of.
The Space Marine figure from the same line of toys has blue armor with a red helmet, and those colors can interact weirdly with colored lighting. I end up more unplanned black & white conversions at the end of the process.