Talk until one is blue in the face (breathless)

Talk until one is blue in the face (breathless)
Meanings
To talk until one is breathless
Examples
I talked until I was blue in the face trying to convince Peter not to give up his good job, but I couldn't change his mind
Ho parlato e parlato fino alla nausea, cercando di convincere Peter a non lasciare il suo ottimo posto di lavoro, ma non sono riuscito a fargli cambiare idea
At the school meeting I talked myself out, but no one would support my position
Alla riunione della scuola mi sono sfiatato, ma nessuno ha appoggiato le mie ideeOrigin
It alludes to the bluish color of the skin resulting from lack of oxygen