http://www.davesclp.com/52ca.jpg
http://www.davesclp.com/53ca.jpg
http://www.davesclp.com/54ca.jpg
http://www.davesclp.com/55ca.jpg
Of course, these look black to me. But if you wanted the 56-62 plates, they'd be a yellow base, and even "better" than black.
Which is why I said earlier "So the fact is, depending on the year, you can get perfect black plates for your car, if'n you live in Cali."
The key phrase being "depending on the year". You can get black, or yellow, or whatever color worked for Cali at the time.