Should I carry a black or brown bag with casual outfits including jeans in the winter?

I have always wondered if I should carry a brown or black bag with casual outfits in the winter. I know that both will probably work, but I could carry black or brown with jeans. I don't like brown with black colored jeans obviously, so I am not sure that black wouldn't be my best bet. What do you think? Or would I do gray? I have one of those as well.

Black Bag
Brown Bag
Gray Bag
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Should I carry a black or brown bag with casual outfits including jeans in the winter?
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