It is extremely frustrating to me that people use the insult 'carrot top' to describe people with red hair because carrot tops are green thank you for listening and another thing red hair is rarely actually red also red onions are clearly purple who is naming all this stuff.....
@TheBreadmonkey Decrease pH and red onions become more red. Increase pH and then they become more blue. Increase pH a lot and you get green and yellow. It's not the onion that's the problem - it's that you haven't pickled enough red onions.