Microchip 93c56 datasheet
The RGB color value is a mix of three color components. R is red, G is Green, and B is blue. Each of the color components (R, G, and B) is a value between 0 and 255 in decimal. What is a Decimal color value (Dec)? A Decimal color value is used as an alternative to the standard Hexadecimal and RGB values to define a color. The following two color code charts can be used as a reference when applying colors to an HTML document. In HTML, you can specify color using its RGB value (using either hex or RGB notation), or by its color name.