I like the green

I think the teal might end up looking too dark. The color of your flooring and vanity lead me to think of a warmer color, but I think a beige or tan wall paint would be too boring.

If this was my space, I would get a sample pot of the green color in the shower curtain mixed as 2 parts green and 2 parts white. Paint a poster board or foam core board and try it out on the different walls. It might look great or it might look hideous, but you are only out the cost of the sample jar of paint and the poster board.

P.S. Paint the sample poster board or foam core board with two coats of whatever paint color you are considering.