two primary colors, like red and green to make yellow. Tertiary colors can be made by either mixing
one primary color and a secondary color together or by mixing two secondary colors together. For
example mixing magenta and red together will make rose. Additive color describes the situation where
color is created by mixing the visible light emitted from differently colored light sources. The additive reproduction process usually uses red, green and blue light to produce the other colors. Combining one of these additive primary colors with another in equal amounts produces the additive secondary colors cyan, magenta, and yellow. A subtractive color model explains the mixing of paints, dyes, inks, and natural colorants to create a full range of colors, each caused by subtracting (that is, absorbing) some wavelengths of light and reflecting the others. The color that a surface displays depends on which colors of the electromagnetic spectrum are reflected by it and therefore made visible. Subtractive color systems start with light, presumably white light. Colored inks, paints, or filters between the viewer and the light source or reflective surface subtract wavelengths from the light, giving it color. If the incident light is other than white, our visual mechanisms are able to compensate well, but not perfectly, often giving a flawed impression of the "true" color of the surface. Our personal and cultural associations affect our experience of color. Colors are seen as warm or cool mainly because of long-held (and often universal) associations. Yellow, orange and red are associated with the heat of sun and fire; blue, green and violet with the coolness of leaves, sea and the sky. Warm colors seem closer to the viewer than cool colors, but vivid cool colors can overwhelm light and subtle warm colors. Using warm colors for foreground and cool colors for background enhances the perception of depth. An executive for a paint company received complaints from workers in a blue office that the office was too cold. When the offices were painted a warm peach, the sweaters came off even though the temperature had not changed. The illusions discussed below will show you that sometimes combinations of colors can deceive the viewer, sometimes in ways that work to your advantage. They can also cause unfortunate effects in your graphics, so be sure to watch out for these little traps. Sometimes colors affect each other in unexpected ways. For example, most colors, when placed next to their complements, produce vibrating, electric effects. Other colors, in the right combinations, seem quite different from what you'd expect.
Here is an example of a greyscale image:
Here is an example of a monochromatic image:
Here is an example of a greyscale image:
Here is an example of a monochromatic image:
Here is an example of an image that uses complimentary color:
