And while solid colors might not be as interesting to look at as fancy background images, they’re much less distracting to the eye-and not nearly as boring as using the same color every time you open Terminal. Now, every time you open a new Terminal window, you’ll see one of your color swatches as the background-Terminal automatically scales your tiny image to fill the Terminal’s screen.

Select the Terminal Colors folder you made for your background images.

Switch to Terminal and repeat the steps to set an image as the window background. Repeat until you have a nice assortment of background colors saved to that folder. Now change the fill to another color you’d like to use for your background, and save it as a new name to the same folder. Fill this image with a color you’d like to use as a Terminal background, and save it to a “Terminal Colors” folder (or whatever you’d care to call it) as a TIFF, PNG, or JPEG (other formats probably work fine, too these are the three I tested). In your favorite image editor, create a new image with relatively tiny dimensions-say 20×20 pixels. But here’s one way to use this trick that might actually be useful-or at worst, not incredibly distracting.

Mac os x terminal colors