I have this canna...I believe it is Indica Apricot-Orange, a species type flower. But I can't tell from your pic if it blooms all the way up. If it does, it could be Marabout.

On second glance, looks like Canna Indica Variabilis...check out the Claines Canna website http://www.clainescanna.co.uk/Canna_indicavarindicaVariabilis.htm

I have C. Variabilis and it isn't that. This has much larger petals than the indica flowers have. The back part of the petals are yellow then turns to the coral color.