Learning PHP, MySQL, JavaScript, and CSS, 2nd Edition

CSS Colors

Colors can be applied to the foreground and background of text and objects using the color and background-color properties (or by supplying a single argument to the background property). The colors specified can be one of the named colors (such as red or blue), colors created from hexadecimal RGB triplets (such as #ff0000 or #0000ff), or colors created using the rgb CSS function.

The standard 16 color names as defined by the W3C (http://www.w3.org) standards organization are: aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, and yellow. The following rule uses one of these names to set the background color for an object with the ID of object:

#object { background-color:silver; }

In the rule below, the foreground color of text in all <div> elements is set to yellow (because on a computer display, hexadecimal levels of ff red, plus ff green, plus 00 blue create the color yellow):

div { color:#ffff00; }

Or, if you don’t wish to work in hexadecimal, you can specify your color triplets using the rgb function, as in the following rule, which changes the background color of the current document to aqua:

body { background-color:rgb(0, 255, 255); }

Note

If you prefer not to work in ranges of 256 levels per color, you can use percentages in the rgb function instead, with values ranging from the lowest (0) amount of a primary color through to the highest (100), like this: rgb(58%, 95%, 74%). You can also use floating-point values for even ...