Confidence: I'm as sure as I can be.
Notes: A Ringlet, but which one? So many it could be. A Slovenian butterfly website lists these for a nearby valley and similar elevation: Erebia manto, epiphron, aethiops, euryale and, the commonest, E. ligea. A higher elevation location not far away also has E. pharte, gorge, pronoe, stirius, oeme and pandrose but I don't think it;s any of those. No underwing shots to help... but maybe the bluish tinge is distinctive?