This species be a blue-green colour when young, often with an ochre centre, before becoming more greyish-ochre as it ages and dries. The gills are blue, becoming brown. The stipe is clavate and pale bluish-grey when young. Under tea tree. There is a similar species, C. calaisopus, also found under tea tree. It differs in having yellow-ochre gills.
Another similar looking species, Cortinarius tessiae, is found under beech.