Black shutters, green door. Paint the garage doors to match the siding, please.

no shutters chocolate brown door

Here are some landscaping rules that will help you create an amazing exterior for this property: https://www.gialluisihomes.com/2016/12/14/exterior-design-lessons/ 

I like the idea of the green door grover proposes along with the black shutters. Definitely paint the garage doors to blend with your siding rather than contrast.

Or you can use blue or red. It is very impactful to tie in the landscaping with the door color. Or to choose a accent color that works with your siding.

Brentwood Traditional 2 · More Info

Charles Garden · More Info

Susan's Cottage: Studio with Upstairs Loft · More Info

Green Door Colonial Renovation · More Info

You could even go with a deep eggplant color which looks terrific with tan/yellow siding. This one is a lighter than I was thinking, but it gives you the idea. Sample with BM Velvet Cloak CSP-480 for example.

Mediterranean Exterior · More Info