Hours would pass after Colt began to absorb the orange pentagram.
As with any other breakthrough attempt, talent had much to do with how difficult and fast the process of absorbing pentagrams was.
The level of the pentagram itself was related to the talent of the person absorbing it, but it wasn't that simple. For example, a person with a green talent couldn't absorb a green pentagram in the 2nd-stage.
The highest known level for a magician's second pentagram was the second one, orange.
Beyond that, even if some magicians had enough understanding to try to absorb something above that, the mana consumed by one of those pentagrams would be so high that the magician's body wouldn't be able to withstand any activation. Just having it in your body would be extremely costly, and activating it would be like courting death.