Whenever a new painting is started, there is an opportunity to play with new colors. Usually a cool red, blue and yellow and a warm red, blue and yellow form the base with white and black. One color will dominate. Mixed with its compliment, it should give the needed neutral. Making a matrix shows some of the variations that can be created. Limiting the palette to a few hues produces color harmony. As a result, you will have a new palette to use again.