They tend to pulsate toward the viewer. Hot things tend to burn red or orange. Cool colors are blue, green and purple. They tend to recede from the viewer. The color of the sky or ocean suggests a coolness in the colors of green and blue.
Artists produce shades of a given hue by adding black, tints by adding white.
Saturation -Is the pureness of a color. Pure hues have the greatest intensity or brightness. Intensity is the degree of brightness or dullness of a color. The saturation decreases when another hue or black, gray and white are added. Value and saturation are not constantly related.