This painting was painted twice! The first attempt with just Carbon Black and Titanium White oil paint mixed together. When the painting was finished it didn't have much life to it, so I put away the carbon black and put out the ultramarine blue, cad red and cad yellow medium and mixed different ratio piles. Then by degrees I added white to the different color piles.
Finally I had grays that were lively! They are called Chromatic Grays.