Complementary colours are colours that are combined to make a grayscale off colours
A complementary pair is when you combine colours that are opposite of each other like red and green, or yellow and purple etc.
When you put two of these colours together they cancel each other out which leads to that grayscale of colours like grey or even brown
My experience of pickling onions was honestly pretty fun and exciting but also you have to have patience. I used lemon juice, vinegar and pepper and salt and let my purple onions and carrots and let it sit in my fridge for about three days. I put it on almost everything especially tacos. I want to make pickles next cause i love them.
Called uli !
lmk if this helped :)