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The masks in the 11th comic are their original color with a little grey spot in the middle. Arent they supposed to be all grey because of the Borok Kal? Tahu also mentions them being at full power, does that mean they found the anticipated Kanohi Nuva on the island?
Please post if you have any idea what is going on

Their Kanohi are only fully grey in the updates and the products because it's easier.
As for the comics, I don't know why they're not all grey yet. Considering we're nearing the end of the Bohrok-Kal section (apparently), they don't seem very grey to me.

It is because in the web updates, they didn't have time to make them gradually grey out. On the other hand, in the comics, it would probably not been a good idea to show Kopaka's mask suddenly losing color on an ice bridge, that would have been quite distracting.