There’s a background color behind your wallpaper (or desktop background in Vista); you don’t see it, but it effects the color of your text. To change this color in Vista , right-click the ...

To change the screensaver on your Samsung TV, ... you can always opt for the Background Theme feature. This allows you to select a solid color or subtle pattern as your screensaver, ...

There are actually several ways to change the wallpaper or screensaver on your Mac, but the most straightforward method is by using the System Preferences menu.