The egg and glass is from a photo I took of a still life set up on a table. I think it is okay but I should have used a cool yellow in some areas rather than a warm yellow. The photo on the right that leans more toward reddish purple was taken under warm/cool fluorescent bulbs while the photo on the left was taken under natural daylight. What a difference lighting makes.
The color theory group I recently joined is studying complementary colors. We began by doing color charts, mine are shown below. My charts aren't neat but it does give me an idea as to the complementary colors and how to gray them.