Enumerate the license plate colors.
enum{
VCA_BLUE_PLATE =0,
VCA_YELLOW_PLATE =1,
VCA_WHITE_PLATE =2,
VCA_BLACK_PLATE =3,
VCA_GREEN_PLATE =4,
VCA_BKAIR_PLATE =5,
VCA_RED_PLATE,
VCA_ORANGE_PLATE,
VCA_OTHER =0xff
}VCA_PLATE_COLOR