I

 

In the garden this looks brown, but when you take a picture it show yellows and reds as you

can see. The style arms are yellow and the beard is more orange than yellow.  I have

changed the stops down and the brown becomes more pronounced. I tried to find this

color in the RHS PLATES and browns are not shown. If I would happen to register this iris

I would have to say its brown so people would recognize it in the garden.