I have just installed Android Studio in my Window 7 64bit.
When I launch the application the background of the screen where we write the code is white.
I would prefer black or any other color.
I am not sure whether we can change the color/theme OR add more themes.
File->Settings->Editor->Colors & Fonts->
In scheme name select Darcula and apply to see a awesome dark background theme editor
Android Studio 3.1.2
File->Settings->Editor->Color Scheme->
In scheme name select Darcula and apply to see a awesome dark background theme editor