Complementary color: opposite of the color wheel. Red+Green, Blue+Orange, Yellow+Purple.

Color: the visual sensation dependent on the reflection or absorption of light from a given surface. 3 characteristics of color are hue, value, and intensity.

Value: lightness or darkness  of a hue or neutral color. A value scale shows the range of values.

line: point moving in space, line ca vary in width, length, curvature, color, or direction

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