I normally have three greens on my acrylic palette: permanent light green, viridian and pthalo green. These are all pretty garish and would never occur in nature. Today I mixed my four yellows with my four blues to make new greens and then threw my yellows and greens together to make...yellowish greens! So now I have a plenitude, a host, an embarrassment of greens---and just in time, too. The green world is cranking up all around.