Because I'm lacking that document, I'll prove myself by sharing a variety of other digital evidence. First we have a screenshot of my internet history from December 1st and tweets regarding NFL uniforms from that same day.
Since the screen shot may be hard to read, here is what is says after the asterisk "NFL rules allow teams to wear designated alternate jerseys, color rush (CR) uniforms and/or throwback uniforms for a combined total of three regular-season games. As in years past, orange served as the Bengals’ designated alternate jersey, and for the third straight year, the team used their color rush uniforms (white jersey, white pants), which debuted in 2016. Cincinnati does not have a throwback uniform."