If you mix on the paper, do all of your work in yellow first, then go to red, and then blue. Always clean your brush between mixtures no matter where you mix the colors. The qualities possessed by any given color which distinguish it beyond hue. All of these qualities are subjective and interrelated. The lightness or darkness of a hue.
Value is a function of the retinal stimulation of the rods.
C. Saturation is the purity or brightness of a hue. Changes in value always lower saturation. Generally, the hues on the color wheel from Yellow-green to Blue violet, which all contain Red or Yellow, are considered warm. Any hue, including black and white can be rendered warm or cool by mixing or by placement. In the pure mixes of the color wheel, blue and violet seem heaviest, yellow and orange lightest.