Green hydrogen is electrolysis based hydrogen that uses renewable electricity OR plasma based hydrogen that uses Renewable Natural Gas with or without renewable electricity.

Anything that is made from Natural Gas is by its very nature grey or blue (per ridiculous color definitions).

The better approach is to use Carbon Intensity values but that is too difficult for the general public (and most professionals) to understand the nuances.

What you are referring to is if it is possible to roll out electrolysis quickly enough using renewable electricity to ensure that our hydrogen portfolio is net zero or at least significantly better than oil and gas as current stands.