What is the Iris? So I know if I should ask you to keep me in mind if you decide to rehome it.
What colors would make a good contrast with it? Is there a chartreuse, maybe, that might set it off like a frame? Here is Golden Oregano. Makes a nice groundcover.
I tried to keep color compatibility in mind with the new Iris beds. Microsoft Publisher, Picasa photo editor, and the web were useful tools to make visual maps before planting.