Reference
Glossary
HexadecimalThe hexadecimal (base 16) number system used for Web-page design
consists of 16 unique symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E,
and F. For example, the decimal number 15 is equal to the hexadecimal
number F. In HTML, an RGB color can be
designated by RRGGBB with the first two numerals representing the amount
of red, the second two the amount of green, and the last two the amount of
blue. If you wanted your background to be red, you could write the code for
a body background color as <body bgcolor="#FF0000">. Black is the
absence of all color and white is the presence of all color, so in
hexadecimal, black is at the bottom of the system (no red, green, or blue:
#000000) and white is at the top (the maximum amount of red, green, and
blue: #FFFFFF).
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