Trappist or abbey style tripels are pale gold to deep gold in color and range in alcohol from 7.5-10%. These beers are characterized by high carbonation and a balance of yeast-driven flavors and alcohol. Yeast-driven flavors may range from lemon to orange to black pepper to clove, with better examples of the style including all these flavors. Paler malts are used when brewing these beers and contribute little to the overall flavor and aroma. Hop bitterness is low-to-moderate and contributes subtle floral and spicy flavors and aromas to the overall complexity. Popularized by Westmalle in 1934, this style quickly spread in popularity, with many Trappist and secular examples now commercially available. Noteworthy examples of this style include: Westmalle Tripel, La Trappe Tripel, Chimay White, St. Feuillen Tripel, Unibroue La Fin du Monde and Tripel Karmeliet.