Along w/paint, I'd do something w/that glaring white garage door. It's too white. Maybe you could tone it down w/a sandy tan color, using the Balanced Beige along w/the other green and brown colors, below
I know they also have DIY painting for your garage door to make it look like wood.
maybe consider an arbor over it.
also consider doing some carriage hardware on the door
replace your address numbers w/something larger and vertical to place on the right side of the garage door
some other combos
if you decide to use blue instead of green, these 4 colors would look nice. (use 174 or 175 for the garage door)
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arbor
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