If using an iPad you can do this but it will impact all sites/apps... It’s not ideal at all, but an option to play with.
How to Enable or Disable Dark Mode in iOS 11 Device
- Step 1: Open Settings app. ...
- Step 2: Open the Accessibility menu.
- Step 3: In the Vision area, tap on Display Accommodations.
- Step 4: Open Invert Colors menu and toggle on Smart Invert.
- Tip: Enabling Smart Invert Colors automatically disables Night Shift mode.