Did Oda change the style and color of Quake bubble?
Or did Blackbeard just block Law's Shock Wille with Haki only, and that bubble is created from Law's Shock Wille since if Shock Wille can't penetrate its target, it needs a mini room to clash since Law needs room to use his DF.
Penetration from Shock Wille is harmless, shock wave creates damage, if Shock Wille can't penetrate and it has to clash with shockwave instead, there needs to be additional room for that since it didn't penetrate the target while clashing.
Anime shows that Blackbeard using Quake bubble to clash with Shock Wille, however Anime also shows that Blackbeard doesn't even use Quake DF to block Law's Takt attack which was strong enough to deflect Fujitora's meteor.