New: this repository is not maintained anymore, the themes are now available in ProtonMail theme creator, where you can also customize the colors to create your own theme.

A light and clear theme for ProtonMail, inspired by Google Inbox, with several color styles.

To install it, copy the whole CSS in dist/pm-inbox-xxxxx-theme.css (replace xxxxx with the style you choose, see below), open your ProtonMail account settings, select the Appearance tab, and paste the CSS into the Custom theme field.

This is based on Austin Delamar's work.

Several styles are provided, feel free to create (and submit me by pull request) your own!