I saw it last year but to me there was definitely more purple than red in the red onion. Of course it wasn't matte like eggplant and it was too much of a show stopper for me as I like my bags boring
I think naughtipidgins' pics are usually quite accurate and that red onion will look different in different lighting. Go for it!
Ps eggplant is purple with no red.
Thanks, hon - you've all been really informative and it's really helped!!!