Mom always said that pink and red do not go together.

My husband and I have an ongoing conversation regarding what plants should be put together, IE, same growth habits, sun, shade, and complimentary colors. I was wondering if my husband was color blind, because he was putting red and pink flowers together, which was like finger nails on the blackboard to me. He also liked to put in flowers that I think are just too tall for a hanging basket. For example he liked to put heliotrope in the middle and tailing petunias on the outside. Again, finger nails on the blackboard. My son said Mom who would buy that basket with that tall weed growing in the middle? I said I didn't think it would sell. He over heard me and my daughter in law discussing one of his red and pink baskets, when he said that he thought pink and red was pretty together. I said, it was just that Mom always said that red and pink do not go together. Well, I had to eat my words today, because, not only did a customer buy the one with the big weed in the middle, she also bought the red and pink one. Maybe he's on to something, what do you think?