Technically, the color is "School Bus Yellow". For reference, Cal plates starting with "V" would be appropriate (close enough) for 1967. There is no exact way to make a determination. The plates Brian has in his post starting with "RDM", are from what I see in the picture, possibly issued for a 1965 GT Fastback in (or near) San Diego. My (October 65) 66 GT Fastback has original plates starting with "RXC" issued in Mountain View, CA. My (May 65) 65 GT Fastback has original plates starting with "NIS" issued in San Mateo, CA. As long as the state got it fees, they didn't care.
Jim