What Does “RGB” Have To Do With Graphic Files?

DEFINITION:

The RGB color model is an additive model in which red, green, and blue (often used in additive light models) are combined in various ways to reproduce other colors. The name of the model and the abbreviation ‘RGB’ come from the three primary colors, red, green, and blue and the technological development of cathode ray tubes which could display color instead of a monochrome phosphoresence (including grey scaling) such as black and white film and television imaging.

LINK: http://en.wikipedia.org/wiki/Rgb

IN MY OWN WORDS:

The three colours, Red, Green and blue are combined to make a positive image. These colours can also be combined to make different colours.The initials RGB come from the colours Red, Green and Blue.

This Picture is from the same above link.