California License PlatesCalifornia uses the letters I, O, and Q in the second alpha position, but not in the first or third.
11 - black on red
12 - black on green
13 - black on orange
14 - black on blue
15 - black on yellow
16 - black on red
17 - black on green
Chris Cargill reports that California started the present sticker color rotation in 1978 with Green stickers. The rotation was Green - White - Orange - Blue - Yellow - Red. White was removed from the rotation after 1997.
He has also seen two different validation stickers being used for late 2012 and on 2013 registrations. Version one is as it's been before with a 4-digit year (2012 - 2013), but he has seen two-digit validations (12 - 13) and there is now an explanation. The difference is the 4-digit version has the random serial numbers on the sticker that CA DMV has always used. The 2-digit sticker has the license plate number printed as the serial number. The 2-digit stickers are issued by the self-serve renewal vending machines at the DMV offices. Every other method of renewal uses the 4-digit stickers.
Isaac Wilson IV reports 2-digit printed validation stickers do NOT have the plate number on them; they have the same standard Lnnnnnnn format as the four-digit stickers. 2014 stickers start with P, while 2015s start with Z.
Chris Cargill reports that California's Black with Yellow letter plates are coming back as a special issue, and will be issued similar to Yosemite and Lake Tahoe plates (special order, etc). The latest word is they will be 6 digits using a Connecticut style numbering sequence (but in reverse letters on either end, numbers in the middle, as above), such as A12 34B. We'll see if that sequence sticks when they hit the road.