I have Brown hair blue eyes should I Dye my hair black?

No, black hair is very harsh. Light bounces off it and it does not usually flatter a face. Lines, imperfections, wrinkles, and pimples are more visible. A person with black hair looks tired. One gets very sick of black hair very quickly, plus it's the traditional hair color of a witch.

If I had brown hair, I'd add lighter highlights or even streaks of gold, especially around my face to frame it and flatter it. Every color of clothing goes with brown.

Black hair is very hard to pull off for most people. I'd talk to a hair dresser about it.

Realize that once you dye it black, if you don't like it, it's very hard to color over it. Just to get back to your original color will mean a lot of treatments that will damage your hair.

no ,try light brown ,yellow brown, nut brown

Blue eyes and black hair can be very striking. To see how you'd look, try on a black wig. Also, don't do a permanent color at first. Do a temporary color. That way, if you don't like it, it'll be gone soon. Go for it!