play around with the Sherwin Williams color visualizer to help you imagine how the colors will look together. 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 “green earth” (# 7748) might be a great 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.