Nuu's colors are based on the RGB Hex Notation.  Each of 256 shades of each of the colors Red, Green and Blue is denoted by a hexadecimal number.  Hexadecimal numerals are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F, the last six standing for 10, 11, 12, 13, 14 and 15.  Two digits are allotted for each of the three colors.  For example, 4B0082  denotes Indigo.  This is divisible into 4B Red, 00 Green and 82 Blue.  Using pairs consisting of two identical digits each and advancing three steps at a time, we have the following: