I picked up a great Photoshop trick from Twitter user @Treatscraft. This is a quick and easy way to try out different color ideas based off of another image. Simply go to Image_>Adjustments> Match colors. From there choose the opened image you want to sample colors from. You can find the informative post here –> Tweet.
Stumbled across this great site full of scenes from movies. A lot of these make for great reference as well as studies. Check it out at- Cinematic Paintings.com