IMO the Arizona gradient numbers were particularly bad because on the red and blue jerseys, the bottom ~third of the numbers was the exact same color as the jersey
IIRC, the NCAA mandated solid numbers on the blue and red jerseys, but the white jersey retained the gradient numbers, because they still technically contrasted with the white background.
I'd say you could make a reasonable argument that the BC numbers "contrast" with the white jersey, since they're mostly red (maybe pink if viewed from a distance). They still look awful though.