Overview
For anyone else who finds the red outlined text kind of difficult to read.
Font Patch
Right-click on ATOM GRRRL!! in the Steam client and click Properties. Click the Local Files tab, then Browse Local Files.
Open the folder called game inside the main ATOM GRRRL!! folder. (It should contain the files archive.rpa and script_version.txt, and possibly the folders cache and saves.)
Create a new plain text document and paste the following lines (make sure to keep spacing and indents!):
Save the file in the game folder as patch.rpy (NOT patch.rpy.txt! If you’re not sure, check that your folders are set to show file extensions[www.google.com]).
You can change #000000 (black) to whatever hexadecimal color code you want, so go crazy, I guess. (The original is #d3462a.)
Uninstallation
Delete the files patch.rpy and patch.rpyc (the encrypted file generated when you launch the game).