Embrace the green! Appreciate the change and the work hubby finally did. No matter what color it is, you will grow to accept it!
First of all, this could be his sneaky way of doing a job so poorly that you won't ask him to do anything any more, fix his wagon and make it work for you.
When life gives you limes, make limeade.
I love the green and pink that the other MOM sent you the link for. For a perfect print, look up "Citrons Verts."
Other ideas: to break up the lime, get some chair railing and paint it a contrasting color either lighter or darker. Get a trifle bowl and put wooden or plastic lemons and limes in it and use it as a centerpiece.
Decorate around a framed print. "Italian Harvest-Limes" isn't bad, or go to art.com and search for lime. There is a pretty one called citrus if you want to go bright. You can get the name of the print then search the internet for the best price.
You can even use your yellow color for accessories, like napkins or placemats. Crate and barrel has some "mediterraneo" dishes that might work, and has some "Navarro stripe," "Piazza" "Atherton" "Taos multi" and "geometric print" napkins and placemats that you can look at for different color options.
Good luck and enjoy shopping!