i have shared the Android method before, #TipsAndTricks
here's the rest
Enable dark mode for Chrome on Windows 10
1. Enter the Settings menu, choose 'Personalization' click 'Colors' and scroll down to the switch marked 'Choose your default app mode'.
2. Change this to 'Dark' and all apps with a native dark mode, including Chrome, will change color. There's no need to restart your browser.
Enable dark mode for Chrome on Android
1. To activate it, enter chrome://flags in the browser's address bar.
2. Tap the 'Search flags' box and enter the work dark. You'll find two options here: 'Android web contents dark mode' and 'Android Chrome UI dark mode'. If you activate the first option, Chrome will detect if a site's developers have created a dark version and select it automatically.. .
^^ continued
If there's no dark version available, the browser will invert the site's colors. Activating the second option means that the browser interface itself will turn dark
3. Tap the drop-down menu under each of these options and change the setting to 'Activated', then restart Chrome.
4. Now open the settings menu, tap 'Themes' and select 'Dark'. If you can't see the Themes option, restart Chrome again and it should appear