To make the mint shade, mix the primary colors of blue and yellow to create green. After that, add a tiny bit of white, preferably titanium white, to the secondary color green to make the mint shade green. You can vary the amount of white and blue in the mixture depending on how light or dark you want your mint shade to be. The more the blue in the paint, the darker the mint shade will be. The more white in the color, the lighter it will be.