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The Motive Web Design Glossary

websafe colours, web palette

The websafe palette consists of 216 colours that when displayed on a 256-colour (8 bit) monitor will be displayed as continuous flat colours.

These colours will be rendered as flat colours on both Windows and Macintosh platforms - as to hue and saturation, well...

Hexadecimal system (base 16)

CSS shorthand

When defining colours in CSS, hexadecimal codes may be abbreviated to a single-digit for each of the 2-digit pairs; e.g. #FF0033 may be abbreviated to #F03.

The hexadecimal counting system consists of 16 unique symbols;

Counting in hexadecimal: 0 1 2 3 4 5 6 7 8 9 A B C D E F, where 0 is null and F is the highest value.

Specifying websafe colours (using hexadecimal notation)

Colours in HTML are specified by a hash (#) followed by a six-digit hexadecimal number. This number consists of three 2-digit numbers corresponding to red, green and blue (RGB) values.

#XXxxxx = red #xxXXxx = green #xxxxXX = blue

The websafe (216 colour) palette consists of a subset of the possible hexadecimal combinations and is restricted to three pairs of the same value at 20% increments, i.e.:

00 33 66 99 CC FF


#000000 = black #FF0000 = 100% red #00FF00 = 100% green #0000FF = 100% blue #FFFFFF = white

Related terms: dithering


Motive Web Design Glossary Trivia