Footer area one background color is different on computer vs. mobile

Hello, I am not sure why this is doing that... on the computer, the footer area 1 (I put a text widget there with my certification symbols) the background is #fff, which is what I've done, but on mobile, it's showing #4c4d4f, will you be able to tell me what I might be missing or what code I should change/add in my child theme? www.luxeweddings.ca Thank you very much.