I bought a packet of sunflower seeds this year that showed a mix of red, yellow and brown flowers. I thought they would look nice against the trellis that was supposed to be covered in passion vines with purple flowers. The sunflowers thrived, the passion vine, not so much. The contrary passion vines did send runners into other parts of the garden where they were NOT supposed to grow. 😉
I also have a dark red one. The insects got to it before it opened which gave it the raggedy edge.