More popular than black(!) - it seems the 'burst brigade' are losing their collective fear of the underworld gods and are now venturing out into the light, and burst is three times as popular as red!
On the subject of red, that colour really should be reserved for Fender Strats IMO - although one of my basses actually comes perilously close to bearing that hue, despite it's maker describing it loosely as 'honey'; it's saving grace being that it's a neck through and, of course, plenty of bling hardware and, oh yes, a spare string for each of the four in case any of them breaks π...