COLORS and HTML

To see why base 16 (Hexadecimal) is useful, consider specifying Colors for Web page using HTML.

See also RGB Color Chart.

To investigate further, look at How to Think Hexadecimally.

Base 16 has 16 different digits.

 One half byte or one nybble or four bits has SIXTEEN different
 possible values, 
                  from 0000, 0001, 0010, 0011, 0100, ... to 1110, 1111.
 In base 16 that 
         would be from   0,    1,    2,    3,    4,  ... to   E,    F.

 In base 10              0,    1,    2,    3,    4,  ... to  14,   15.

  
More RGB background pages including Dougie's Color Picker.