There's a huge repository of RStudio Editor themes and option to customize them here:
TmThemeEditor. You can also upload your own .tmTheme for further editing.
However, how to edit RStudio Editor themes that is stored as a .rsTheme? I would need to back transform it somehow to .tmTheme file to edit it online.
To use .tmTheme in RStudio, u just need import them into RStudio and RStudio converts it into a .rsTheme. Any idea how to edit .rsTheme directly or transform it back to .tmTheme?