Clattenberg says that it should’ve been red:
https://www.bbc.com/sport/football/59736316
One thing he mentions that we probably all agree on though, is he says in Greece they release the audio of the VAR decisions. They have the audio feed in rugby and in all honesty I think it makes a huge difference and would be a great positive. It just makes everyone have a better understanding of why they make some of the decisions they do.