I thought there were three, but not really new:
Silver - 153.860
Gold - 154.175
Orange - 154.235
Usually no tone on tac channels.
153.86 is a low power walkie frequency used by many FDs
154.175 is Monterey county dispatch frequency used in PG, Carmel etc.
the Santa Cruz fire freqs are:
154.325 red (dispatch includes AMR ambulances)
154.190 yellow command
154.414 blue
154.445 green
154.055 black
154.280 white 1
154.265 white 2
154.296 white 3
154.130 UCSC
156.075 Cal-Co-ord
There are also a couple of UHF repeaters licensed to Boulder Creek and Felton; but I don't know if they even have radios for using them...