Just as every secondary color is made by mixing two or more primary colors together, to make brown paint, you also need to create a mixture of three primary colors, though there are instances where you can also make purple paint from other secondary colors.
1. To make purple paint, the three primary colors you will need are blue, red, and yellow. Get a palette and put an equal amount of each color on the palette. It is important to note that if you don't use the same proportion, you might not get perfect brown paint.
2. Get a palette knife to blend the three colors together. Start by placing the palette knife at the center of the three colors, then begin to pull the three colors together until they are uniformly mixed together.
3. If you want to add more depth to the mixture, put a small amount to the mixture and mix.