Monochrome Screen(Monochrome painting in shades of grey): Monochrome display screens display only two colors usually black and white, amber and black, or green and black. If your principal applications are word processing or number manipulation, a monochrome monitor will probably suit your needs nicely.
Monochrome painting in shades of grey display screens will be either monochrome or color.
Color Screen: Color display screens can display between 16 and 16.7 million colors thats depends on their type. Most software’s today are developed for color, and – except for some pocket PCs-most microcomputers today are sold with color display screens.