In terms of color, I don't think blue is close to green. I see the green as a great fall winter warm color. The blue is just stunning and I can see it worn with denim and any top. While the styles are the same, colors very different. Both gorgeous colors. Should you branch out to some other style shoes? Maybe. But if you love the style and it makes your heart sing, I say keep both colors. I think you will regret sending blue back.