Are coppers' uniforms blue or black?

Both actually

The tunic is black..... which we hardly ever wear except for court appearances. The rest of our uniform is a mixture of black and blue. It all depends on which force you are in and which department within that force. I wear blue trousers and a black polo shirt.

Uniforms in most U.S. cities are blue. However, officers in other cities (some in California, I believe) wear black. And then there are officers in the warmer climate cities (Phoenix, Arizona; Dallas, Texas and Miami, Florida are examples) who actually wear light brown uniforms.

Black?

In the Uk it depends which force they are form, some have blue trousers and some black. Its supposed to be a standard across the UK but different forces have gone off and bought there own stuff.

Depends on where you are. Some have blue, some have black, I've seen tan uniforms.

I live in florida and the local cops are blue but the stat troopers ar black and gold

It depends on the city. My city is blue and the city right next to mine is black.

Blue, brown, tan, black - depends on the city, county or state.

Depends strictly on the department. Varies from dept. to dept. Some even wear kaikis, there are no set stardard rules.

The darkest blue possible- that's why the program was called NYPD BLUE