Mix blue and yellow paint until the desired green shade appears
Use more yellow for a brighter, lighter green
Use more blue for a deeper, cooler green
Add white to lighten green
Add black to darken green
Adjust with small amounts to avoid over-correcting
For vivid green, start with a strong yellow and a saturated blue
For lime green, use more yellow and a small amount of blue
For forest green, use more blue and a small amount of black
For olive green, mix green with a touch of yellow-brown or red-brown and a little black