There are a few more shades of green to work with. He's got some color now. The more colors we are allowed to display, the better it is. So, we can make any shade of color we like from these three colors. The tradeoff is that it takes more memory, and speed to display more colors, since the computer has to deal with that many more shades to choose from.
Stuff looks pretty good at that.
And when we move to 24-bit color, we have a range of 16.7 million colors, which is called 'true color'. So the more bits of color information our video card can handle, the better the picture looks, with the tradeoff of processing power. This is the ARGB that our above video card mentions. So, the video card listed above can handle 32-bit color, which is currently the top of the line color depth. Other video cards out there currently handle only 16 bit color, which isn't as pretty, but has the virtue of running faster since there is less work to do.