Almost all of them are black.
I've found the lowepro passport sling almost perfect for my street stuff, (and my first one was black). After looking at the newer versions to see if they'd solved the one problem I have with it I thought "wait a minute, ALL camera bags are black, this probably says "camera bag"
I'm sure I was overthinking things, but I ended up buying a second one in the "mica" colourway which is a grey/greenish colour, which may or may not look marginally less like a camera bag.