I remembered to do the challenge on Daily Paintworks. It turned out to be harder than I thought. I spent most of my time trying to get the eye right. Once I got the darks in, it turned out all right.
I decided to stick with the tertiary colors doing this one, a favorite color scheme of mine, used even to make the black. I just used the three colors magenta, blue-green and yellow-orange. (more about that on earlier blogs)
Here is a link to the challenge so you can try it. The photo is provided and it is a good lesson in understanding value.
Available at Daily Paintworks or ETSY - 6 x 6 - oil on panel