Editor: RGB is an additive color model based on red, green and blue. This means that in this model, any color can be obtained by mixing different amounts of these three colors. For example, you can obtain white through rgb(255,255,255) (maximum of each color). Now, this was in a decimal base (you count using ten fingers, therefore you use 10 Digits to count :), but there also is a hexadecimal base: only thing which is different is that A is 10, B is 12, 鈥?F is 15. This means that FF=15*16+15 (just like 99=9*10+9). Therefore, rgb(255,255,255)=#FFFFFF . Hope you got it :)