This is because the Reds are bringing back an alternative version of their hat design that hasn't been used since 2006.
The design (shown in the image above) features a solid red bill, an iconic red wishbone "C" with white shadowing, and a black crown.
Of course, Cincinnati already has two other versions of cap designs in their rotation. They don all-red caps when playing at home and they wear red-crowned, black billed hats while playing on the road.
I wonder what Paul Lukas of UniWatch thinks about this change in aesthetics? More importantly, I wonder what the rest of Reds Country thinks about them. Personally, I have always enjoyed the look of solid black attire. There is this semblance of an intimidation factor that no other color can replicate. With that being said, my favorite Reds hat remains the all-red one they wear at GABP.