I found this image on wikipedia: http://en.wikipedia.org/wiki/Image:Mandel_zoom_00_mandelbrot_set.jpg and i have seen this image like many times, but i have never understood as to how it is plotted. How is the value of the color decided? Plus, if it is a complex plane, how are the axes defined? I remember reading that if a point lies in the complex set which is being plotted, it is given the color white, otherwise it is plotted as black [or vice versa, not sure]. Either ways, how are the other color values decided?