SQL Server 2012 Management Studio – Darker Shades of Blue Theme
If you download SSMS Exported-2012-04-20.vssettings you can then import the syntax color settings from the Tools menu in SQL Server Management Studio selecting Import and Export Settings. I’d recommend saving your current settings before importing the new settings as this gives you the option of going back to the previous settings.
Within the Import and Export Settings Wizard you can selectively import settings and as such your other settings within SQL Server Management Studio will be preserved. You can see here that you can choose only to import settings related to Fonts and Colors