I never use colour in my art because, plain and simple, no medium works well with me. So I started using my rotting oil pastels one day out of boredom and I found a colorful medium I can use! I love it. All my art (around 5 pieces) have been sketches and practice, but I really like it.
The photo above is a tiny chunk of my first one. I am not posting the full yet since it is not finished. The color makes it look spiritual, so I love it. My favorite result so far.