Methane gives which planets their blue-green color

Hi,
Well Uranus is a gas planet which has a lot of methane gas mixed in with its mainly hydrogen and helium atmosphere. This methane gas gives Uranus a greenish blue color Neptune also has some methane gas in its mainly hydrogen and helium atmosphere, giving it a bluish color.

Ihaven't done that yet, so no idea,but this is not the right place to ask