I can see why you suggested Cortinarius austrovenetus. However, in that species the stem colour is different and on it you see traces of the partial veil that covered the gills before the cap expanded. Your sighting is more interesting in that the subject is probably a species of Hygrocybe (or a related genus) and the green species of Hygrocybe (or relative) are seen far less often than is the case with Cortinarius austrovenetus.