play around with the Sherwin Williams color visualizer to find colors that you like. It is the best paint visualizer on the web, imho. I like how their color palette is laid out, I like that you can search by color family & color name, the "painted" rooms look the most realistic, and it suggests coordinating color schemes. You can literally spend hours:
http://www.sherwin.com/visualizer/

I think a green like "gleeful" (# 6709) might be a fantastic choice.

You can take a photo of your house & upload it to the makeover gallery on this website:
http://www.roomvues.com/
You can get color suggestions & for $5 they'll photoshop them onto your room so that you can get an idea of what it will look like.