The defender got to wear the armband for the senior team for the very first time.
Colwill, an academy product who spent time on loan at Brighton, was part of the team that lost 2-1 at Manchester United on Wednesday.
“VAR has something against me right now, I don't know what I've done to them," he said about one of United's goals not being disallowed.
“Against Brighton they tried to give a pen, and then when I got pulled [by McTominay] they didn't give anything. If I had pulled him like that they would have given a penalty. It is what it is.
“It was a frustrating night. We had chances that if we'd taken would have made the game quite different, but it's part of the game and we'll move on from it come the weekend against Everton."