Hi there,'
It looks like a violet
Yesterday I looked through a great website about flowers in the Dolomites but your violet was not one of them
If you remember, years ago, Oron Peri used to answer plant identification questions
I believe Mr. Peri is involved in the Alpine Flower Society maybe you could find your answer to the violet question through them
However, as we do not have a moderator now, only four of us can add to this site and It doesn't look as if the other two know your flower.
I have given up trying to name the plants I snap as there is always something I have missed, the underside of the leaf, the colour of the bark etc.