I'm getting ready to build a 10 x 14 lean-to greenhouse on the back of our existing house where a shed of the same size once was. We have vinyl siding on the rest of the house but where the shed was is still the old nasty looking wood siding so we put up t1-11. This is the north wall of the greenhouse and I'm planning on painting it. What color would be best? Light blue to match the rest of the house or maybe black? Or does the color matter that much?