As y'all can see, these in red are drops of blood, it's exactly the same form Kishimoto draws the blood "flying" after a strong blow, I also sent some examples where the blood is drawn in the same way as in the Limbo scene.
And I'm not send this to argue "Madara 1 Rinnegan > Prime Kaguya" but rather as supporting evidence for his scale. He should scale to the duo, he was declared the most powerful shinobi in history in the databook, he was also declared close to Hagoromo, and he was also declared by Guy to be the most powerful enemy they faced, and the fact that he capable to hurt Naruto makes the statements true, then it must scale from version 1 Rinnegan.
PS: Guy hasn't seen Kaguya, so this statement doesn't apply to her