I like to change around my default color scheme in my text editors. I love Sublime and use it for a lot of .txt documents. I don't like the default white-on-gray scheme that is uses though.
I saw other answers about how to change a specific background color based on the file type, but I haven't come across anything about making a specific file type use the default setting.
I would like any text file I open/create in sublime to use the same color scheme as what I currently have selected from the preferences menu.
Open a .txt file in Sublime, then select Preferences -> Settings-More -> Syntax Specific-User to open Packages/User/Plain text.sublime-settings. More than likely there is a line in there setting the color scheme to Monokai, which is Sublime's default. Just delete that line, save the file, and you should be all set.