In the group of British bitters, strong bitter is the highest gravity version. The examples range from dark gold to copper, while the alcohol content falls between 4 and 7% ABV.
They have a malty character, often complemented by caramel, toasty, and fruity notes. Hop aromas and flavors are moderate, the carbonation is low to medium, while the body is medium to full-bodied. The key to strong bitter is moderation. Despite the name, these brews are not dominated by bitterness, and it should only accentuate the malt.
All bitter styles developed after 1642 and the invention of coke—the carbon fuel made from coal. Before that, malts were roasted using peat and wood, which would always impart darker color and smoky character. This invention allowed brewers to create lighter styles, both in color and flavor.