Holcocera concolor is a moth in the family Blastobasidae. It is found from Massachusetts north to Nova Scotia and west to British Columbia.
The length of the forewings is . The forewings are yellow orange.
Larvae have been reared from several Pinaceae species, including Pinus resinosa, Pinus rigida, Pinus strobus, Picea abies, Picea glauca and Larix species.