HTML:  Colours

#000000
#FFFFFF (white)
#FF0000
#00FF00
#0000FF
#FF00FF
#00FFFF
#FFFF00

It is very simple to create your own colours.  Each colour code is constructed from its location in a colour hexagon.  Below is an explanation:

#3300FF (twilight blue)

The # simply means number, it is used to tell the computer that there is a code.
The 3300FF is simply the code of the number.  This is nothing more than three colour codes in one.

The first two characters (in this example 33) is the colour red.
The second pair of characters (in this example 00) is the colour green.
The final pair of characters (in this example FF) is the colour blue.

The number which forms the pairs is the amount of the primary colours which are in the overall colour.
33 means that there will be a fairly low amount of red in the colour.
00 means that there will be no green in the colour.
FF (full) means that there will be a very high amount of blue in the colour.

Making a colour if you do not have a colour hexagon is as simple as writing how much of the three primary colours will be used to make any other colour.