Imagine FX (2015) Explore Colour Keys in Your Art
This tutorial and video has some helpful tips for quickly laying down colours and experimenting with the mood of your painting.
Jeremy Vickery chooses references that he can apply to his own concept depending on the mood and time of day. He picks colours from the references and lays them down in large strokes under the line art. After a few colours are blocked in, squint your eyes to get an impression if the scene is working. Stay loose and fast so as to discover the colours that you want. You can add a soft glow to areas of the painting using a low flow soft brush set to linear dodge.