I like to explore using limited palettes, and a lot of the classical painting training includes doing a painting in just two colors, such as ultramarine blue and burnt umber (plus white). That’s what I selected for this acrylic color chart.
My lightest value could definitely have been lighter than it ended up. I’m still getting used to the value shift as acrylics dry. Plus, I was using a mid grey palette paper and while that was great for getting the mid values on track, it made the lights look much lighter than they were in reality.
It would be cool to do a small painting study using just these colors, focusing on value and color temperature over color matching.