Campanula scheuchzeri

Indigo bell flowers, prefer sunny but not dry weather.

A low growing bellflower common in the European alps. Dark blue or occassionally white. Sunny but not a dry place.

Gorgeous closeup, (mine is yet to flower) Simon Eugster; Wikimedia Commons

Habitat shot growing in grasses in Switzerland; H. Zell; Wikimedia Commons

Lastly, like C. rotundifolia, the leaves are variable depending on the season.