Here's what CoachAccountable Dark Mode looks like.

How to Turn on Dark Mode
You can quickly toggle in and out of dark mode by typing Alt+Shift-+D whenever your cursor is NOT in some input.
This is hard to do on a mobile device, so you can also set your preference under My Account >> User Profile:
Setting this here makes it your default across all devices, and the Alt+Shift+D trick overrides it on a given device.