I colored this image while on a work trip recently. I simply stamped the image with Archival black ink onto watercolor paper before leaving the house and tucked the image, my waterbrush and pencils into the suitcase.
The image coloring is a bit rough because the lighting at night in the hotel room isn't the best. However, I am really pleased with how pretty she turned out. Notice the intensity of the red color in her hair ribbons. This is the same pencil that colored the pink in her dress and socks. I applied pencil directly on the hair ribbons and used a small amount of water to activate the color. Also, I scribbled pencil on some palette paper and used a watercolor brush to mix the color with water, allowing me to apply intense color to a very small space, like the hearts on her socks. I watched this video and used similar techniques throughout my image.
I'm serious folks - you need to give this a try. If I can do it, anyone can.