Which beer style is characterized by a deep amber to copper color and complex malt flavors?

The Belgian Dubbel is characterized by a deep amber to copper color and complex malt flavors, making it a representative choice for this question. This style typically features a rich malt backbone with flavors that can include caramel, toffee, and dark fruit notes like raisin or fig, resulting from the use of caramel and roasted malts. Its fermentation process often incorporates Belgian yeast strains, which contribute additional nuances such as slight spiciness or fruitiness.

In comparison, while Bière de Garde displays malt character, it usually has a more restrained profile and can lean towards light to medium copper hues. The Belgian Dark Strong also possesses dark malt characteristics but is often darker in color and has higher alcohol content, with a more pronounced fruity and complex blend of flavors. The Belgian Blonde, on the other hand, tends to be lighter in color, typically golden to pale amber, focusing more on balance and hop character rather than the deep malt complexity found in a Dubbel.