BJCP 4A
A somewhat sweeter version of standard/premium lager with a little more body and flavor.
A broad range of international lagers that are darker than pale, and not assertively bitter and/or roasted.
Dixie Blackened Voodoo, Shiner Bock, San Miguel Dark, Baltika #4, Beck's Dark, Saint Pauli Girl Dark, Warsteiner Dunkel, Heineken Dark Lager, Crystal Diplomat Dark Beer
You can view the complete style details on the BJCP website. The 2008 style guide is obsolete but there is a similar 2015 style that you can view below...
OG: 1.044-1.056
FG: 1.008-1.012
IBU: 8-20
SRM: 14.0-22.0
ABV: 4.2-6.0%