Barleywines can range in color from pale straw color to rich chestnut color. It usually is a bottom-fermenting brew made from barley malt. In Germany, bocks usually have over 6.25 percent alcohol by volume. They usually range in color from golden to dark brown. Outside Germany, of course, strengths vary.
American bocks are usually dark brown.
There are even Triple Bock brews. Dopplebocks tend to have 7.5 alcohol by volume or stronger. These, in Germany, are a southern speciality brewed in March and April, and their names usually end in -ator. May. Maibocks tend to be more pale than traditional bock beers. This is a vague term that usually means a dark lager, but not necessarily.