​KembaraXtra-Computer Terms – bitplane:
A bitplane is one layer of several bitmaps that together form a complete color image in memory. Each bitplane contains information corresponding to a single bit of the data used to represent a pixel. When multiple bitplanes are combined, they produce the full color value of each pixel in the image.
For example, one bitplane can represent two colors, two bitplanes allow four colors, and three bitplanes allow eight colors. These layers function like stacked sheets that collectively create the final image. Bitplane structures were commonly used in graphics systems such as EGA and VGA displays operating in certain color modes.