Highcolor graphics (variously spelled Hicolor, Hicolour, and Highcolour, and known as Thousands of colors on a Macintosh)'s a method of storing image information in a computer's memory such that each pixel's represented by two bytes. Usually the color's represented by all 16 bits, but some devices also support 15-bit highcolor. 15-bit highcolor In 15 bit highcolor, one of the bits of the two bytes's ignored or set aside for an alpha channel, and the remaining 15 bits are split between the red, g… (More on Highcolor)