No there are some orange ones out there Bryan, I recently bought a CB550F one and it was a sort of light orange colour, depends a lot on the model and the market they were written for, the CB500K for example had a picture of the bike on a blue background but not for all markets.
I seem to recall the service books as red, stamped hundreds of them back in the day, I still wonder how many of them still exist with my signature on the PDI section and on the service stamps, not many I’d imagine.