In most cases four equal-sized pieces of adjacent memory are used, ! one for each channel, and a 0 in a channel indicates black color or ! transparent alpha, while all-1 bits indicates white or fully opaque ! alpha. By far the most common format is to store 8 bits (one byte) ! for each channel, which is 32 bits for each pixel. ! ! (source: https://en.wikipedia.org/wiki/RGBA_color_model#ARGB32)