I would say she is receptive now. If you plan to breed her I would put them together now as opposed to a month or two. She will possibly cycle infertile eggs and be digging in two months. 11 months is plenty old enough as long as she has good size as well. JMO She is very pretty.
Well, I don't know too much about what people say are great colours because I have had lots of great looking green and brown pets lol.
Emma is certianly one of the brightest looking females I have seen though, it certainly seems like a good idea to get her breeding!