A Red Dress? Really?

My stepmom messaged me the other day asking again for the 50th time what our colors are. I let her know they are rose gold, gunmetal grey, and black. My dad is wearing a grey tux with a black shirt and a black bowtie. She then proceeds to let me know she does not wear those colors, and prefers red... I am really annoyed because she will be in a lot of our pictures, and she is going to stand out like a sore thumb next to everyone else who is in gray, blush, black, and rose gold...I am contemplating asking her kindly to please wear something in those colors. Should I? Would you? I just feel red is SO loud, and do not think it is appropriate for the family photos etc. I could understand if that was one of our colors or close...but it isn't. Ugh!