How to change the Spyder editor background to dark?

If you're using Spyder 3, please go to

Tools > Preferences > Syntax Coloring

and select there the dark theme you want to use.

In Spyder 4, a dark theme is used by default. But if you want to select a different theme you can go to

Tools > Preferences > Appearance > Syntax highlighting theme


Tools->Preferences->Syntax coloring->Scheme changed to "Spyder Dark"