And sure, that only is probably going to end this debate.
However, in this manga we saw only two different colours of swords: White and black. Ryo's Is black and looks exaclty as any other black balde we have seen:
Why are we supposing Ryo's Is some imaginary colour never used for swords?
Not to mention, Oda himselef said to look at VCs for canon information and that's what VCs showed:
Seems plenty to assume the sword is Indeed black.
However, in this manga we saw only two different colours of swords: White and black. Ryo's Is black and looks exaclty as any other black balde we have seen:




Why are we supposing Ryo's Is some imaginary colour never used for swords?
Not to mention, Oda himselef said to look at VCs for canon information and that's what VCs showed:
Seems plenty to assume the sword is Indeed black.
The simple answer is that Oda just didn't color it in himself yet & we've seen colors turn out to be something entirely different from the official volume colors before.