This theme for the Chrome developer tools is meant primarily for IntelliJ IDEA users that use the Material Theme plugin, since it aims to bring the familiar color theme introduced by that plugin to the browser inspection tools. However, other users looking for an aesthetic change to their trusted tools are certainly very welcome to try this theme out, too.
Instructions to enable this (or any third-party) theme may be found in the associated GitHub repository, which is linked in the overview of this extension.
As mentioned, this theme takes inspiration from an IntelliJ IDEA plugin which you can find here:
https://plugins.jetbrains.com/plugin/8006-material-theme-ui
Please be aware that there is now an official Chrome Extension from the maintainers of the above-mentioned Material Theme plugin that can be found here:
https://chrome.google.com/webstore/detail/material-devtools-theme-c/jmefikbdhgocdjeejjnnepgnfkkbpgjo
Extore is a team of professionals who are passionate about creating extensions for web browsers. This devotion also gives us opportunity to appreciate work of other people. We get inspired by useful, open source extensions made by developers all over the world. Our strong belief is that one should share helpful add-ons with others. That’s why we’d like to present you our ever-growing list of favourite extensions that have inspired us. Moreover, as you probably have already learned, sometimes struggling for the best brings an end to the good. Talking about add-ons it often turns out that an upgrade is worse then previous version. Also it can become really tricky to get back to the beloved version of your favourite extension. That’s why we’re going to make not only the latest, but all versions of our favourite (and we hope yours too) add-ons available for download. No more compromises, just stick to the version you really like!