Watches

This is going to be my first watch so I want one that fits with almost any look: from everyday/informal day, to more elegant, special day. I am between black and navy blue. The problem is that I am afraid navy blue is not going to fit with every informal outfit because I do not usually wear blue, but I feel it is more elegant and fits me perfectly with my suit, also it goes good with my uniform because it is also blue. On the other hand, black should fit with everything, but I think it might look weird in some outfits because its deep color stands out. I really love both, but I have to chose one, which one do you recommend me?