Check out the luggage on the carousel next time you get off a flight. The great majority seems to be black, rather than say, red or blue.
Anyone know why this is? I have a couple of guesses: (a) fashion (b) so scuff marks don’t show so much © black is a neutral, generic “colour” that goes with just about anything.
WAG – that’s mostly what is sold in bag shops. The one exception at this on-line retail site is a pink colour, used for carry-on bags.
Personally, I’d go for a dark colour myself, but with something of a bright, flurescent colour, say a wrap-around tag or sticky tape, so I can tell my bag apart from the rest.
Just slightly off-topic – I notice the same here in NZ when it comes to bags coming off the coach buses. I use reflective bicycle tape around the handles of my bags so I can tell them apart from the rest on a night-time street. Or, I choose army-camouflage style khaki.
It is no fun, whatsoever, when the OP answers its own question. It is down right unfair. 
Sorry kniz - I was hoping someone would drop in with something like, “Well, I’ve been president of product development at Samsonite for 20 years and…” - and give a definitive answer. Mine were just guesses 
I don’t know where I read this – it might have been here on the boards.
A soldier was in the baggage claim area with a planeload of other soldiers. He called out, “Has anyone seen my bag? It’s green.”
WAG: “Black goes with everything.” Some people are concerned about things like how their bags go with their clothes. Or: “Black doesn’t go out of style.” I remember that my parents had matching blue-and-green plaid suitcases. Quite stylish in the 1960s, no doubt; but not so much now. I remember in the 1970s, seeing avacado green luggage. Not very 21st Century. Black is a colour (no need for the inevitable nit-picks, please) that seems to stay in style.
As for me, I use an olive-drab parachute bag. It’s cheap, it’s sturdy, it holds a lot of stuff, and it’s compressable. Who cares about style?
Okay, I actually read the second paragraph. Your guesses were the same as mine. And I do know how to spell “avocado”.