As you might know, normal coffee cherries turn bright red in colour when they become ripe, but this rare varietal actually turns yellow! Another 'rare' varietal, Yellow Caturra (a.k.a. Carturra Amarillo) features a brighter citrus acidity - almost lime-like - but still sports Caturra's typical cacao notes. 
 
It's what we'd describe as a 'funky coffee' - following the new acidity trend in the capital city, a typical London hipster would love this varietal thanks to its unique citrus flavour.