In the window of the pigment store where I work part-time there are banks of display cases full of colored pigments. I've been wanting to record them and then come home and try to match the colors with paint.
which by the way, is an old enamel kitchen tray found on Ebay.
And then to match the colors swatches on a test sheet of paper. The next step is to make a painting.
My watercolor teacher, David Dewey, used to say, the painting is first of all, set up on your palette.
Get your colors down there first. I used to take a ton of pictures of his palette mixings.
Then put it down on the paper.