Hughton believes referee Mike Dean made the right calls in awarding Palace a penalty and in dismissing Leroy Fer, who was booked for conceding the spot-kick and sent off late on for picking up a second caution.
But the Canaries boss also felt Palace striker Marouane Chamakh should have been dismissed when Norwich were in front.
The Morocco international was booked by Dean after grabbing Wes Hoolahan by the throat and pushing him to ground and Hughton was surprised the former Arsenal man was let off with only a yellow card.
"I have no complaints with the penalty," he said.
"I don't have any complaints with the ones that went against us but certainly Chamakh should have been off the pitch.
"The referee had a very good view of it and, to the letter of the law as I know it, if someone raises a hand it's a sending off.
"Credit to Wes Hoolahan - he didn't try to get the lad sent off. He got straight back up and he didn't try to make a meal of it but it was a sending-off offence."
- Marouane Chamakh
- Wes Hoolahan