Knowing color theory is important to give direction to your compositions. There are three elements you must know to create color harmony. If there is no harmony, then one or more of these is out of whack.
Hue - The name of the color. (Red, Yellow Blue, etc.)
Value - The light or darkness of a color. (Dark Red, LIght Red, etc)
Intensity - Level of brightness or darkness of a color. The amount of light reflected or transmitted
Red, yellow and blue are the primary colors for ink/pigment and red, green and blue are the primary colors for light. A primary color cannot be made from any other color.
Secondary colors are made form a combination of two primary colors.
Tertiary colors are made from a combination of three colors being primary or secondary
Saturation - The level of white, black or gray, ranging from neutral to brilliant.
Warm colors comes forward and cool colors recede.
Warm -Yellows, oranges, and reds.
Cool - Greens, blues, and violets.
Tint – Base color plus white.
Tone – Base color plus grey.
Shade – Base color plus black.
These are the basics you need to know to start making sense of color and to begin a more thorough study of color theory.
That completes our brief look at composition and color theory.
Now, I also took a detour when I began discussing visual vocabulary, so I will get back to that.