A dark theme created for Python's built in IDE, IDLE, that has a similar color palette to Monokai, but has colors that are easier on the eyes.
Dark theme in IDLE. Similar to Monokai, but with softer colors.
To install this on Windows 10, go to "C:\Users(username goes here).idlerc" and paste the config_main and config_highlight files here. Then, open the IDLE shell and, under the "Options" toolbar, open "Configure IDLE" and click on the "Highlights" tab. Select the "dark_theme" option and click Apply. You can change it back to the default theme in the same menu.
To install on Linux, go to /usr/lib/python(version_number_here) and copy paste the contents of the file "config-highlight.cfg" into "config-highlight.def" and proceed with the following steps.
To install on MacOS, follow the steps here.