This specifies the color that links will be for the few moments while the browser is looking for the linked location. These are red by default. There are important style and usability issues involved with choice of background and text colors. Background graphics are often distracting, lead to slower download times, and make text more difficult to read. This is particularly important if students will be printing from your site.
People learn to look for blue when they look for links.
Using other colors raises the likelihood that people will have difficulty understanding how to use your site. And Usability Please give us your feedback on how-to materials.