I recently discovered the Nord theme for VS Code and was absolutely blown away by its simplicity and elegance.
Next thing I know, I’m creating a RStudio port of this theme - you can find it here on Github. If you are using RStudio v1.2.0 or newer, you can directly install the theme via the preferences dialogue. Feel free to give it a try!
If you are like me and want to know more about the Nord theme family, the developer of the VS Code theme has created a stunning website https://www.nordtheme.com/ that also features ports for other code editors.