Originally, this was just a speedpaint in grayscale around 30 minutes or so, but I decided to add color and refine it just so I could practice on my coloring techniques. I used layers in color and overlay mode to add the base colors and then merged them. After that, I refined it more by adding some more details. I used color dodge brush to add glow on the lights. I also used some adjustment layers to adjust the color and contrast. If you're interested to see the process, you can check it out on my blogsite. (link is on my profile)