The dictionary says...
"Core values are the guiding principles that dictate behavior and action."
As an artist the concepts of value and color guide my palette choices. I try to always begin a painting with a small value study such as this one for "Tangled Up in Blue". (The tick marks guide me when I transfer my composition to my painting surface.)
I take a photo of the painting and use the mono filter to change it to a black and white version of the painting.
Stick to your values in life and in painting!