"It's a massive win for us. I felt we started the game very well but as you say when you get the red card, it's an early red card, so it's a daunting feeling," Kean told Sky Sports News.
"You need to look at each challenge ... I was really expecting him to throw a yellow card but when it was red I couldn't believe it."
The win moves Blackburn out of the relegation zone in the Premier League table.