Black textile is pretty safe at night. Or at least, Joe Rocket is. They have reflective stripping in the black trim! Pretty awesome, it looks black during the day, but it shines white in headlights (or a camera’s flash). Not sure which other brands also do this. I think all the high end ones do.
The downside, black is still a lousy idea during the day. All black is worse: The human perception notices changes more than things or shapes.
So, the best way to get someone’s attention is to “change”. At night, you can do this to oncoming traffic by wiggling the front end just enough to have your light beam move from side to side (works as well as flashing your high beams without blinding the guy or making him think you’re telling him to go ahead and turn left across your path).
When you wear clothing with different colours (say, red jacket with black trim and white helmet), as you move about different areas are thrown into contrast and you are more visible. If you, your bike, and your helmet are all black, than the only thing that you have going for you is your silhouette and any reflections.
There are some very slick looking jackets (imo) that have black arms but a white torso (or black body, large white stripe in arms). When kept clean these high contrast jackets can look really cool while, be visible, and avoid the fluorescent yellow look.