Colors are described as cool or warm depending on its position in the color spectrum and the hues of its nearest neighboring color.
Red, orange and yellow are warm colors, while violet and blue are cool colors. Green is said to be the most neutral color.
Colors are further categorized into primary, secondary and tertiary colors. Primary colors are blue, red, and yellow. These are pure colors that have no component other than themselves.
Secondary colors are orange, green and purple. These are composed of the primary colors on either side of it on the color wheel. Orange is made form red and yellow, Green is made of yellow and blue, Purple is made of blue and red.
Tertiary colors are orange-red, orange-yellow, yellow-green, blue-green, blue-purple, and red-purple. Tertiary colors assume more of one color than the other.