That super photo by Jon Evans is of a plant from our chum "The Butcher", Alan Newton..... I must ask him where he got it. 
It's pretty.... but I can't see past the blues really.
This one came from Anthony when I picked up a couple of troughs from him last year. I think it's from Edrom but they don't have it listed at the moment.
I'm like you Maggi, Gentians are blue. I probably wouldn't have bought this from a nursery though its quite nice. My collection of Autumn flowering Gentians has this pink one and a white one which my wife persuaded me to get

The rest are blue.
Should have some more photos in a week or so.