The Paired Mixed project was a interesting assignment picking Analogous Complementary colors and making the illusion of transparency. The task was to make the colors look transparent but with each pairing, one pair had to look  equally the same and one pairing looking more like one color and vice versa.
A issue I had was making the colors look like Analogous colors. For example, when I mixed them they looked like the color that needed to be made on the color chart, but when I painted them on the Bristol they eventually oxidized to a different color. The process was frustrating but I realized I should have painted in natural lighting.