I wore a black saree with silver/gold kaam the day after my nikkah and noone had any problems with it except my tayee who haw haw-ed over it asking why I couldn't wear something else. I say you go for it PF, black is gorgeous! I am wearing a black gharara to a wedding this weekend and I hope people don't start saying stuff to me :)
I love black and wear it to weddings etc as well. I hate it when people have those old fashioned ideas related to color, but since they are our elders, its hard to say anything. I remeber on my son's aqiqah I wore a small elegant jewelry set and my in laws were all-- wear something "bigger"!!