The official Wrestlevotes Twitter account has posted the following regarding the reason why the color of the Hell In A Cell structure has been changed. Apparently the call was made by Vince McMahon himself. Check out the tweet below.
Asked about the Red Cell... source said “honestly, w/ all this 20 yr talk about Taker & Foley, I think Vince forgot how old the match was. So he changed it up. Like when Mania lost its roman numerals. Just something new.” Also, they did test for visibility and it’s OK. #WWEHIAC— WrestleVotes (@WrestleVotes) September 16, 2018