I thought I would start a post of people posting their favorite colored aquatic plant( non- green) . I will start with my Dwarf Water Lily (Nymphaea Stellata). Not only is it beautiful, but easy to grow with variations in growth that offer interesting dimensions to your aquarium.
How tall do your dwarf lilies get? I have one in my high tech tank...it's kind of a PITA, since the tank is 18" and it grows so fast and tall that I'm forever having to cut it down. But it's beautiful. If it grew slower and more rounded I'd love one in the 20 long (12" deep) I'm starting to put together.