Anytime an iris has brown, tan or copper listed as colors, I am a bit wary.
I have some yellow/brown irises that I love some days and hate on others (don't tell them).
Blue J describes Dear Dorothy as a bi-color with yellow-orange selfs (upper petals) and light powder purple (or almost brown!) falls with yellow orange edges and hafts
This closeup shows the light purple falls and yellow beard. Nice. Almost rainbow-colored in the range of colors. And, of course, 'free' is always nice.