The universal selector, *, is very useful because it
matches any element. It is useful for many things,
particularly in user preferences for fonts or, for example, colors:
blockquote { /* This matches the blockquote element */
color: white;
background: blue none;
}
blockquote * { /* This matches any element inside blockquote */
color: white;
background: transparent none;
}
/* declarations of "color" for any element that could be within
blockquote, such as links, must be in this stylesheet too */
The universal selector is very useful if a user with a disability must enforce some preference for all elements, for example, large fonts. It is also useful when specifying colors.
(Up to User Stylesheets Guide, CSS, David Baron)
LDB, dbaron@dbaron.org, 1999-06-15