Performing conversion from screen displays to that of paint colours is necessary as they work on different principles of light transmission. Screen displays use the RGB colour compositing, while RYB uses the RYB colour compositing. RGB works on the principle of light transmission such as from screen displays. However, the same principle does not work for paint as the paint itself do not emit colour, hence they appear muted when they are mixed. The effects of colour mixing will also be different as seen from the picture.