I've been going through Charles Sovek's book "Oil Painting Develop Your Natural Ability" chapter by chapter. I had been stuck on Chapter 2, Looking At The World Through Colored Glasses. Some of what he was telling me was not making any sense to me. Finally after re-reading it many times, then, leaving it alone for awhile I think I'm understanding it a little better.
Here are some exercises I've done from both Sovek's book as well as Macpherson's Fill Your Oil Paintings With Light & Color.
The above exercise was from Chapter 2 exercise 8. Lightening & Darkening the Home Value of Color
This was my favorite exercise, from Kevin Macpherson's book. I was to match the color at the top. Looking at the color, figuring out was it lighter than the blue from the tube, cooler, warmer etc. Lots of fun. I think this will require a lot of experience before it comes easy.
I am using a very limited palette. Ultramarine Blue, Cad Yellow, Permanent Red Medium, plus black and white, so the above exercise didn't take long at all. I was to make a value scale from black to white, then add my colors under the value that matched my pigments.
I love the challenge of a limited palette and learning to mix just the right color. I also spent some time mixing a bunch of different greens but I couldn't get a photograph to show all the wonderful differences. I did take notes but not as detailed as I will next time. Next on my list of things to do is color charts ... yippee, more color mixing.