The Color Wheel is a chart that shows relationships between colors. There are many forms of color wheels yet the colors are always in the same orientation.

PRIMARY & SECONDARY
Secondary colors are made by mixing Primary colors. On the color wheel, the Primary colors are spaced apart while the color in between them shows the color created when mixed. For example, red and yellow make orange.
Red + Yellow = Orange
Red + Blue = Purple
Blue + Yellow = Green

PRIMARY COLORS
Red
Yellow
Blue

SECONDARY COLORS
Green
Purple
Orange

TERTIARY COLORS
These are colors in between Primary and Secondary colors, such as blue-green and yellow-orange.

HOT & COOL COLORS
Hot colors stand out the most, while cool colors are said to recede and appear dark in low light. When a red is placed next to a blue, for example, the red will most likely stand out. Hot colors are often associated with fire, happiness and excitement while cool colors are often associated with the sky, nature, mystery and melancholy.

HOT COLORS
Red
Yellow
Orange
Purple

COOL COLORS
Blue
Green
Purple

OPPOSITE (COMPLIMENTARY) COLORS
These are colors across each other on the Color Wheel. There are three things to learn about Opposite Colors.
1 When opposite colors are placed next to each ther they make each other stand out, more so than hot and cool colors.
2 Equal amounts of opposite colors mixed together will make brown.
3 A small amount of one color and it's opposite will make a darker tone, for example, adding a small amount of red to green will make olive green and adding a small amount of purple to yellow will create mustard-like yellow.
Red - Green
Yellow - Purple
Blue - Orange

ANALAGOUS COLORS
Colors next to each other on the color wheel such as yellow and orange.

SHADOW COLORS
Arist often use these colors as opposed to black or grey to create darker tones.
Blue
Purple

TINT
White is added to make a color lighter
SHADE
Black is added to make a color darker
Yellow is added to make a color brighter.

NEUTRAL COLORS
These tones match all other colors.
Black
White
Browns