Step 3
Open up your IntelliJ IDE, and at the top, click File > Manage IDE Settings > Import Settings. Pick the directory that you got from unzipping the .zip file, and follow the prompts.
Step 4
After the prompt to restart your IDE, open Preferences with Command-Comma if you are on Mac, and Control-Comma on Windows.
Step 5
Choose Editor on the left sidebar, and pick Color Scheme. From there, you should see a drop down menu to select the Color Scheme. If you did everything correctly, you should see your color scheme in the list. Go ahead and select it, then press Apply at the bottom right corner of the screen. Give the editor a moment to change, and voila! You have your new theme. Press OK to finish, and enjoy your theme!