Truecolor (known as Millions by Apple Computer) graphics is a method of storing image information in a computer's memory such that each pixel is represented by three or more bytes. Generally one byte is used for each channel with the fourth byte (if present) being used either as an alpha channel data or simply ignored. Byte order is usually either RGB or BGR. However, systems do exist with more than 8 bits per channel, and these are often also referred to as truecolor (for example a 48-bit truecolor scanner).