The color, pink is a tint of red, and pink flowers do share with red flowers a bit of the latter's flamboyance. The terminology, "pink flowers" is used here, for the sake of convenience, as something of a catch-all for a number of shades ranging from the very light pinks to very deep pinkish colors that are more accurately called "magenta," etc. and could just as easily be grouped with the purple flowers.
Many lovely plants bear blooms in this delicate color. View my pictures of pink flowers to aid you in your floral selection.