When it comes to customizing your desktop, OS X seemingly provides anything you could want—there are a number of Apple-provided images, there are connections to your user’s Pictures folder and iPhoto library, or you can use any of 10 provided solid colors for your desktop background. But if you’re a fan of solid colors, you may not agree with the 10 that Apple has provided. Thankfully, there is a relatively easy ways to get additional color choices.
Step 1 Open the system preferences window
Click the Apple menu at the top of the desktop, then click "System Preferences to open the System Preferences window.
Step 2 Open the screensaver
Click "Desktop and Screensaver."
Step 3
Click the "Desktop" tab.
Step 4 secect solid colors
Select the "Solid Colors" option on the left side of the window, then select the color swatch that you want as your new background.
Step 5 close system preferences window
Close the System Preferences window.
