I wanted a quick, easy, and lightweight Trello dark mode plugin for my own use, so this just injects some CSS lines via JavaScript into the page on load. Right after you install, enable, disable, or uninstall, you may need to refresh currently open Trello pages.
Some generic dark mode plugins work great, but add some delay to page loads, while this is very lightweight by comparison. Also, the built in Trello dark mode has white card faces, which was a deal breaker.
If you want to customize further or see the CSS, you should be able to take my code via the developer console if you want to adapt it for another site or modify it somehow.
Personal Information Access: The code that injects the CSS background colors and text colors needs access to the loaded Trello page. That page will contain your Trello user content, and so there will be a permissions warning due to that. You can use the developer console to examine the code before logging in to Trello if you have any concerns.
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!