Flatland is a simple theme and accompanying color scheme for Sublime Text 2 & 3. It is mostly derived from Soda, the right place to start for any custom theme development for Sublime.
You can install it using the excellent Package Control package manager for Sublime Text:
Open “Package Control: Install Package” from the Sublime quick menu (Command-Shift-P).
Select the ‘Theme – Flatland’ option to install Flatland.
You can also install it manually by following these instructions:
Download theme files
Unzip the files and copy the folder newly created folder into your Sublime Text Packages directory with the name Theme – Flatland. You can find that directory by selecting “Preferences > Browse Packages …”.