Your monitor can likely only display 256 red values, 256 green values, and 256 blue values. If you do have the fortunate advantage to actually have a $10000 monitor that can display more than that per channel, then there is nothing you can do. Otherwise, you still have full color ranges (256^3 = 16.777 million color combinations) The 'TV' command will accept an infinite range of values, but will convert them by channel into a 256 color range. Perhaps you want to look at OpenGL calls for image display if you also want to add in the Alpha channel.