The background color in each cell corresponds to the color code shown within that cell. Each color code consists of the concatenation of the hexadecimal (base-16) representations of the RGB component values for the color shown. The first two digits are the Red value, the next two are the green value, and the final two are the blue value. For example, FF9900 represents a red value of FF (255 decimal), a green value of 99 (153 decimal) and a blue value of 00 (0 decimal). Javascript Color Chart