I do Agree with u thats kinda weird from oda to make it colored black like i said before but the thing is if he does indeed had a black blade Scabbards of all people should mention it since they knew only one black blade that they know which is shusui. But the fact they didn't mention that, it means its not a black blade.
about Kujaku sword, the fact that oda choose color black ( in black and white format ) even tho it was colored light brown in this volume, makes me believe that not all blade whom colored black ( in black and white format ) are indeed a Black blade. its just Oda's style, just like Queens hair and many possibility.
Plus we already got an official action figure colored from Eichiro Oda staff twitter that Greenbull sword was indeed the same like on Anime. it was White. I want to know the answer in this SBS but it seems we didn't get any confirmation to it sadly.
