The Raiders trolled the 49ers' new black uniforms

Don't cramp on Oakland's style -- especially if you're a Bay Area rival.

The 49ers found that out the hard way after revealing their alternate, all-black uniforms a few hours before the NFL Draft began.

That's when the team that's known for wearing all-black tweeted this:

It was all just a jab at San Francisco's new look.

(h/t Bleacher Report)