COLOR!

PRIMARY COLORS
Red + Yellow = Orange
Yellow + Blue = Green
Blue + Red = Purple or Violet
Definition: The primary colors are red, blue, and yellow. These colors cannot be mixed by combining any other colors, they are dominate in all bases of color in some form or another, and they are the basis for making most other colors.
One could argue that a pure pigment of a color such as orange (the concrete color of an actual orange) is not red or yellow in theory but if you tried to reproduce that exact orange color with paint, it would be rapidly noted that it cannot be done without the red or yellow use of primary colors.
Of course, the more of one color used, the more change is seen in the color or hue, eg., 1 drop of red and 10 drops of yellow will create a more "light orange" effect than 1 drop of red and 5 drops of yellow which will create a "rich orange" effect.
SECONDARY COLORS
Red + Orange = Red-orange
Yellow + Orange = Yellow-orange
Yellow + Green = Yellow-green
Blue + Green = Blue-green
Blue + Violet = Blue-violet
Red + Violet = Red-violet
Black or white paint added to any color makes the color darker or lighter. White and black are absolute or neutral colors. White will create a pastel effect and care should be taken in using it. A translucent white lightens without substantial changes in hue (the color of an object but more technically, the quality of a color and the dominance on a wavelength). It allows the color to pass through.
COMPLIMENTARY COLORS
Regarding the color wheel, complimentary colors are the colors opposite of one another which as seen above fall into many shades. It is advisable not to mix the complimentary colors unless you are looking for a gray, black, white (which is difficult) or a brown color, otherwise termed "mud", where too many colors or opposite colors are mixed. Mud is often created.
Please see wikipedia for information on colors:
http://en.wikipedia.org/wiki/Primary_color
http://en.wikipedia.org/wiki/Complementary_color
Color is easily considered a science and even more complicated color wheel exist.
I personally like the wheel below, 'The Real Color Wheel" provided by:
realcolorwheel.com/
Much more information regarding color (blogs) to follow.




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