I was at a most unusual Christian meeting a few short weeks ago on 5th December 2009. Convening the meeting were the leaders of several of the main Christian denominations, a sight you would rarely expect. And strangely, most of the congregated faithful were wearing something blue, and not just blue clothing – people had on blue face and body paint, blue wigs, blue tinsel and draped themselves in blue flags, bedsheets and banners :-
https://www.christian-ecology.org.uk/climate-service-2009-pr.htm