Mix red and green in equal amounts
Mix blue, red, and yellow together
Add a small amount of black to orange
Combine red, yellow, and blue, then adjust with black or white
Mix complementary colors like red and green or blue and orange
Increase red for a warmer brown
Increase blue for a cooler brown
Add yellow to lighten and warm the brown
Add black to deepen the brown
Add white to make a lighter chocolate brown