February 06, 2013, 3:59 PM — Here's how you can change the color of the terminal window in OS X.
1. Open the terminal app.
2. Go to the Preferences menu.
3. Go to Settings.
3. Click the Window tab.
4. Click the Color and Effects button under Background.
5. Select your color.
For more, see the original article at the link below.
Adjust Background Opacity, Blur, & Background Image | OS X Daily