How to Mix Green Paint. Green is a secondary color that is created by mixing two primary colors--yellow and blue. Painters know that supplies cost money, and the ability to mix custom colors saves money and creates rich and interesting artwork.
Get a palette and paintbrush. Keep a cup of water on hand to moisten your brush and paints.
Squeeze yellow paint onto your palette, then squeeze blue paint onto another area of your palette. Most paints come in tubes, but if you are using a liquid paint, you can skip this step.
Dip your brush into your yellow paint and swirl it around in a clean area on your palette.
Mix blue into the yellow by dipping your brush into your blue paint and swirling it on top of the yellow. This action creates the color green.
Adjust the shade of green by adding more blue paint to make it darker, or more yellow paint to make it lighter.
If you are using watercolor paints, use a palette that has indentations for mixing colors so your colors don't run. Acrylic or oil paints can be mixed on a variety of different palette styles. To create a pale green color, you need to add white to your yellow and blue paint mixture. You can also mix paint on your paper or canvas instead of a palette. Just add one color on top of the other. This method works well with watercolor paints.
Your brush must be completely clean before mixing colors. Even the smallest amount of paint on your brush can affect the final hue of your green paint.