Often stated, if the values are right, the hue is unimportant. This is so true. Squint, squint, squint to see the values. A grey scale of ten values is my trusty companion. Ten oil colors from dark to light values might be ivory black, dioxazine violet, burnt sienna, ultramarine blue, viridian, cadmium red, yellow ochre, cadmium orange, cadmium yellow, titanium white. Of note, colors will vary by manufacturer. To test your ability to see values log onto this website http://www.xrite.com/online-color-test-challenge.
