Eupithecia unicolor is a moth in the family Geometridae. It is found from British Columbia south to California.
The wingspan is about 21 mm.[1] Adults have been recorded on wing from May to November.
The larvae feed on Juniperus scopulorum, Thuja plicata and Chamaecyparis nootkatensis. Full-grown larvae reach a length of about 20 mm. Larvae can be found from April to May and pupation occurs in June. The species overwinters as a mid-instar larva.[2]