How to Customize Color and Image of Window Background in macOS – You can change the background of a Terminal window in macOS, as you may or may not know. You can use a color or an image, and you can also change the transparency level of the color or picture you’ve chosen. These options can be found on the Profiles tab of the Terminal > Preferences screen.
On the left, there’s a column of shell profiles, each with a different color scheme. You can choose one of these or create your own profile. When you click on a profile, the profile’s settings appear in the main portion of the window. Click the Color & Effects button in the Background section to alter the background color. A color picker window will appear, allowing you to choose the color you want.
To use an image, select it from the pop-up menu next to the Image setting. When you click it, a Choose button appears, and when you click it, a file dialog box appears. Select the image you wish to use and click the Open button after you’ve navigated to it. The image will be in the background when you open a new window.
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Here’s a tip: instead of picking a single image file, choose a folder with multiple images and click Open. Every time you open a new Terminal window (Command-N), one of the selected photographs from the folder you specify will be displayed at random. The types of photographs you choose to store in the chosen folder will most likely determine whether you find this effect entertaining, useful, or distracting.
But there is one method to employ this trick that might be useful—or at the very least, not too distracting. Create a new image in your favorite image editor with relatively small dimensions—say 2020 pixels. Fill this image with a color you’d want to use as a Terminal background, then save it as a TIFF, PNG, or JPEG to a folder called “Terminal Colors” (or whatever you choose to call it) (other formats probably work fine, too; these are the three I tested). Change the fill to a different color for your background and save it under a new name in the same folder. Rep until you’ve amassed a nice collection of background colors in that folder.
To set an image as the window background, switch to Terminal and repeat the procedures. Select the Terminal Colors folder, which contains the backdrop images you created. When you open a new Terminal window, one of your color swatches will appear as the background—Terminal will automatically resize your little image to fit the Terminal’s screen. While solid colors aren’t as visually appealing as elaborate backdrop graphics, they’re far less distracting—and far less boring than having the same color every time you open Terminal.
Colors can be tested by dragging and dropping.
You can experiment with different colors for your Terminal window in macOS by dragging and dropping color swatches onto it. You’ll need a color picker on your screen to use drag-and-drop. You can get one by going to Terminal > Preferences > Profiles and selecting any of the color boxes under Color & Effects, Text, Bold Text, Selection, Cursor, or ANSI Colors. A window with a color picker will emerge.
Drag a color swatch from the color picker onto the window to alter the background color. Rep with different colors as needed until you find one you like.
Any color you drag and drop, however, does not permanently modify the setting. To make the color permanent, go to the Background: Color & Effects color picker in the Profiles settings and pick a color.