Personally, I like the pink. You do not, it's your quilt and your choice. If you are set on changing the pink to the yellow, I think the only way to go is to remove all the pink and change to the yellow, if that is your final choice. Any other solution would look like you changed your mind half way through and to my obsessive nature, that wouldn't do. What are your plans for the quilt? Everyone is very supportive and I would love to see your final decision. Good luck.
Sue