ΥΕS Helena! These look so lovely on you, especially the first!
From one hazel-eyed brunette to another: love the olive green and it will love you back. Brown is beautiful but I think it's a harder look with brown hair: unless you do a who column of if, the lack of contrast with hair is tricky. I've also recently discovered that my skin has a very pale olive undertone, as well. You might look into that...
Posting the Finds that are currently my favorites. That button down looks so blah in the image, but it's the perfect match for my eyes. Hard to see, but the coat has buttons with a similar sharp green detail. My sneaky power color. Hope you find yours!!!