This article deals with websites' colors displaying incorrectly. If more than colors are incorrect, see the Websites look wrong or appear differently than they should article.
You may have inadvertently set the page style to "No Style." To ensure Firefox is set to use the page's default style:
Firefox has a setting that allows you to override a page's text and background color settings. To turn off this setting:
Windows has settings that can affect the display of web pages in Firefox.
Ensure that Windows is not in high contrast mode.
The ATI Catalyst 7.12 video drivers can cause blue text to show as red on Windows XP. You have a few options to fix this problem: