After playing with my Stampin Up Watercolor Pencils, I wanted to experiment with blending colors. I printed this chart on Stampin Up Shimmery White and on Strathmore Cold Press Watercolor Paper 300 series (better). For example, to get a "redder" red, combine Real Red and Melon Mambo.
This first page shows all 13 colors. I also made a second page which leaves out the Basic Black and only mixes the colors once.
I'm sharing my blank chart here so you can make your own! Think of all the possibilities!