Once I get out of here

I'm again having a small hair discussion with myself, and am thinking, again, of maybe trying to get my hair into a mint green. Now that it's a dark green, I don't really know how I could accomplish my goal, but maybe I'll find a way, or maybe some of you may have ideas as to what I could do?
Or even should I try pastel green hair?

Here's some inspiration from Tumblr: