From Johnny's Selected Seeds
 
"High-yielding yellow jalapeño.Pale yellow to start, the 3 1/2–4" long fruits transition to an orangey red, finally ripening to bright red. Arriba matches well with our green hybrid jalapeños, as they are all similar in size and shape. Though typically eaten yellow, fruits can be consumed at any stage of ripeness. Medium-size plants have high yield potential. An excellent salsa ingredient, Arriba is also delicious either as a substitute or an addition to recipes calling for green jalapeños. Also known as a "Caribe" type pepper."