It is from the the three primary colors, red, yellow and blue, that all other colors are made. Green, orange and violet, are the three secondary colors, which are made by mixing together two primary colors. Green is the secondary color produced when the primary colors yellow and blue are combined. When mixing paint or another medium, you can easily add other colors to green, in order to produce different color results.
By adding the color blue to green, you produce blue-green. If you add only a small amount of blue, the resulting color appears mostly green with only a tint of blue. If you add a large amount of blue, your resulting color should appear mostly blue, with only a tint of green.
When yellow is added to green, yellow-green is created. This yellow-green color can be made to appear more yellow or more green, depending upon the amount of yellow added. When combining a larger amount of yellow than green, your resulting color appears more yellow, with only a tint of green.
Red mixed with green always produces shades of brown. This happens because red and green are opposite colors from each other. Depending on the amount of red added to green, the shade of brown you create could appear more red or more green. Adding a large amount of red, for example, creates a brown that has a noticeably red tint. Similar results are achieved when green is mixed with orange or violet.
When white is added to green, a lighter, pastel green is created. If you add only a small amount of white, your green color will only slightly lighten. If you add a large amount of white, your green will lighten dramatically, and may appear mostly white with only a tint of green.
Black added to green creates a darker shade of green. When large amounts of black are added, the green darkens dramatically. When only a small amount of green is added, the green only slightly darkens.