My unusual flower

I spotted that this plant was coming into flower in the cabin. It has been getting very hot in there when the sun shines because the cabin is very well insulated, which obviously brought on the these blooms.

I love the blue tinge to the flowers as well as the pink sheath at the end of the flower stem. I' have no idea what its name is and can't remember how I came to have it. I think it may have been a random purchase of a remaindered bulb which I bought in a garden centre a couple of years ago. Anyone have any ideas?

I'm adding this as it is probably a Flower Friday even if I am running a week behind.