Don't lknow what blue or red is but if the breaker is bad, it won't matter. With no power to the boat, check continuity with a voltmeter while you switch the breaker on/off.
If nothing changes, you found the problem.
If the breaker works, turn on the power and (carefully) check to make sure you are getting power to the breaker hot side.
I am unfamiliar with Beneteaus but most, if not all manufacturers install a breaker at or very close to the shore power plug. Check that first.