These profiles bring the Base16 colors to the Terminal of macOS.
In Terminal, select Terminal > Preferences/Settings > Profiles. Then open the downloaded profiles
folder in the Finder and drag the files you want to install into the list of profiles.
Since .terminal files contain a bunch of settings in addition to the color definitions, you
probably want these profiles to inherit all settings from a profile of your choice. (By default, my
builder extends the Basic profile, which is one of the default profiles provided by Apple.)
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Download my fork of the Base16 Builder.
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In Terminal, select Shell > Export Settings and save the file into the folder you just downloaded. (You can also export profiles in the Profiles section of the Preferences/Settings window.)
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Execute the following commands. (Replace “MyProfile” with the name of your profile.)
cd ~/Downloads/base16-builder-php-master # the folder you downloaded in step 1
composer install # depends on your Composer setup
php Builder.php -update
php Builder.php -p "MyProfile.terminal"-
In Terminal, select Terminal > Preferences/Settings > Profiles.
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Drag your preferred profiles into the list of installed profiles.

For this screenshot, I used the Atelier Sulphurpool profile with the
FiraMono Nerd Font (11pt),
along with Oh My Zsh and the Powerlevel10k theme.
Hint: You can download my personally customized set of profiles, which use exactly this font and come with a few improvements over the default profiles (IMHO), such as a blurry, transparent background for inactive windows.