Greya variabilis is a moth of the Prodoxidae family. It is found on the Chukchi peninsula of north-western Siberia, the Pribilof Islands, Alaska and along the North American west coast. In the northern part of the range, the habitat consists of tundra. In the south, it occurs in moist coniferous forests.
The wingspan is 12–18 mm. The forewings usually have a purplish brown base colour with various patches and streaks of pale ochreous in different patterns.
The larvae possibly feed on Saxifraga species.