There are three main groups of colour codes: RGB triplets, RGB codes, and Literal
Names.
RGB triplets
RGB
codes
Literal Names
"RGB(1,2,3)"
"#44,55,66"
"Name"
Where 1, 2 and 3 are whole numbers
from 0 to 255. 44, 55 and 66 are codes, 00 is no colour, FF is full colour, and then I think
that everything between is a percentage. Name is just the colour's name.