How do you define open-mindedness?

Over the years I have seen a lot of arguments between people concerning hot button topics in politics and social justice.

If I color code them, the Green side claims the Orange side is close minded because they don’t believe in or agree with XYZ. However the Orange side does not care to listen or understand where the Green side is coming from. So is the Orange side really as open minded as they claim to be? Are both Green and Orange sides equally close minded and stubborn in their views?

I personally define open mindedness as acceptance and possible appreciation for ALL sides and opinions, and I think that’s VERY hard to do and be so I think open mindedness is actually very very rare. I definitely don’t think only Orange people are open and all Green people are closed. How do you define it?