This is a reference to show how selective coloring can be used to enhance rather than take away from an image. This is a simple coloring tutorial that you can use, and please, build off of. Obviously, by the nature of the post, non-translatable, but should would work with all forms of Photoshop.
PLEASE NOTE: Selective color is not the all to end all coloring tool. Sometimes it's easier to just use variations, hue/saturation, a fill layer, or curves. It's all going to depend on what you're trying to do. Some of these colors are a little extreme. Don't be afraid to mess with the opacities and have fun and make it your own! 
