I found this really interesting guy on devinatart who has a lot of tutorials on how he works with colour and how to do it his way.
His username is aquasixio, (http://aquasixio.deviantart.com/) and his real name is Cyril Rolando. He is 30 years old and is currently a psychologist. He does digital painting in his spare time.
Here’s some examples of his work.
Cross Over Together (2014)
Good Night (2013)
Don’t Trash Your Dreams (2012)
I selected just three of my favourite visually appealing pieces of his. I really love his selection of colours and how they work well together. I feel that this is something I need to work on because when I colour things I just select the colours that the objects are and I don’t really think about how well they work together.
I will be looking more into his tutorials and how he picks his colours as I find his way quite interesting. He uses turtles when he’s choosing his colours. (http://aquasixio.deviantart.com/gallery/8808807/Tutorials)