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The photos by Cliff, Luit and Philippe in the links I gave are, I am confident, not "photoshopped" at all. Happily very few forumists are in the habit of adding unnecessary "oomph" to their photos - it is one of the joys of pictures here that they are, with VERY few exceptions, natural representations of the plants.
Well, more information received but as far as I can see doesn't take my search much further. My friend found a label and it shows Gentiana clusii 'Mefisto'. I have not managed to find anything tangible on Google, The Plant Finder (difficult to find anything on it these days!), or The Plant List, or indeed a search on The Forum. I did find a vague reference below:-http://mailman.science.uu.nl/pipermail/alpine-l/1997-June/026809.html
(Attachment Link) This is a shot of the plate in Halda's book - colour isn't too good, because background colour on actual page is a sort of mossy green, which is not showing up at all in the photo. Anyway, 'Mefisto' is the purple/pink flower with reddish spot to the outer - centre right of the image as it appears here.
Reds are one of the most mis-described colours , I reckon. The spots on the outside of the trumpets are certainly more obviously red.