Then what about Black & White?

We find that mixing of all three primary colors result in black or dull gray. Psychologically, black & white are colors because they produce sensations. They have symbolic meanings and definite effects on visibility. They give tonality to hues and have strong effects on other colors by mixture. After mixing black in to red it converts a vibrant red in to a deep brown, & white converts a vibrant red into a soft peach or pink. To physicist, black & white are no colors. To him white is light consist of all colors, where as black is the absence of all colors.

Harmony can be defined as a pleasing arrangement of components, whether it will be music, poetry, layout or color scheme. In layout, harmony is pleasing to eye. It holds viewer attention. The human brain rejects what it cannot organize or what it can not understand. Color harmony helps us to deliver visual attention & sense of order. The following illustrations shows basic formulas of harmony.

Analogous colors are any 3 colors which are present side by side in the 12 part color wheel Such as

yellow-green, yellow yellow-orange.

* this group contains one primary color and besides two colors, they do not have required relation to create attractive analogous color scheme thus designer should use it carefully.

Complementary colors are any two colors which present directly opposite direction in the 12 part color wheel. Such as green and red, blue and orange, and red-purple and yellow-green.Opposite colors created maximum contrast & maximum stability in the layout.