"Cascading" style sheets
Style instructions can be contained within an individual tag or page, without referring to a separate style sheet.
These instructions will override those of the site's style sheet, hence the term "Cascading Style Sheets:"
An instruction in a page's text...
<span style=" color:#ff0000">
This is red text.</span>
...overrides a style instruction for the page...
<html>
<head>
<style>
.redtext {color: "#ff0000"}
</style>
</head>
...which overrides a style
instruction for the site.
<head>
<link rel="stylesheet" href="format.css">
</head>
<body>