White does not appear green because of the mechanism of color constancy. Our perceptual systems are optimized for seeing the green frequencies while at the same time optimized for separating a single frequency of green from light that is mostly green but contains a mix of frequencies.

What are green and whites?

During 1918 and 1919, the 'greens' (socialist revolutionaries) and the 'whites' (pro-Tsarists) controlled most of the Russian empire. They were backed by French, American, British and Japanese troops who were opposed to the growth of socialism in Russia.

When you mix green and white?

On the top row of the above color chart, you see that when green is mixed with white it creates a lighter green. Mixing green with white is probably the easiest and most commonly thought of in regards to what two colors make green lighter.