With Dark Mode becoming more popular as a display option, we've had several requests to create a dark mode feature.
With our development pipeline full for the rest of 2021, it won't be something we release until next year, but there is something you can do.
You can use an extension for your browser:
Keep in mind, although they are customizable, they might not be 100% perfect. Here's an example using the Chrome extension.
Note: extensions can interfere with browser performance.