These are color schemes that were part of Sublime Text 2 and older builds of Sublime Text 3. They are no longer maintained, but are available via Package Control.
- Install Package Control
- Run the Package Control: Install Package command from the Command Palette
- Type "Color Scheme - Legacy" and press Enter
For Sublime Text 3 build 3127 and newer, use the UI: Select Color Scheme command in the Command Palette.