The NABA list would consider this Callophrys dumetorum, but that name has been shown to apply to the Coastal Green Hairstreak, formerly viridis.

Bramble Hairstreak, Callophrys perplexa
Skyline OSP, San Mateo County, CA, 4/19/2003
Bramble Hairstreak, Callophrys perplexa
Sunol, Alameda County, CA, 3/13/2004