Here's how I approached the throne room colours:
1. Start with the blue glow around Rey' lightsabre, reflecting off her as well as Kylo Ren a bit.
2. Lay a flat red glow across the whole piece. It was extremely helpful that the paper, Bockingford, allows a great deal of lifting off colour even after a few minutes, which gave me a great amount of control over the whites here.
3. Adding darker reds and textures, going through the piece in trailing lines to cut across the movement.