My status bar is now black. It looks like the

[iMore Question]

It looks like a negative.

 

[Ledsteplin]

Welcome to iMore! Try a hard reset.
Hold the top power/sleep button and the home button at the same time until the Apple logo appears, then release.

 

[Bigeric23]

And if that does not work, you could try toggling Settings > Accessibility > Grayscale.