2 colors are in the name of this drink, equal parts ale & stout or porter
... 
Another cocktail called Black Martini is as follows: 4  oz (130 mL) vodka (
Absolut), 2 oz ... Tan: Stout beer (such as Guinness) and another, lighter beer (
such as an ale... [DOC] [TLE] Beer Styles by Name - Glass with a Twist [PAR] Ale : A generic name for beers produced by top fermentation.