The default Windows XP desktop uses a predefined combination of colors and fonts. If you don't like this combination, you can choose from several other predefined schemes.
Right-click anywhere on the desktop to display a pop-up menu.
Select Properties from the pop-up menu; this opens the Display Properties dialog box.
Click the Appearance tab.
Pull down the Color Scheme list, and select a new theme. Click OK when done. Default (Blue) is the standard Windows XP color scheme.