How do you make green paint?

Add blue and yellow to make green (I would start with equal amounts of each) add white to the green you just made until it is the mint color you are looking for. If it seems a little on the yellow side (like celery) you can add more blue - just a very tiny amount. If it seems a little on the blue side (like turquoise) you can add more yellow - just a very tiny amount. You can play with this until you get the color you are looking for. Remember, you can always add more white to make it lighter (pastel).