I would make a contrast between the stucco and shingles. "For what it is worth department" - if your paint swatches are accurate in color - I feel the light green is more mint green in color with a lot of blue in it and doesn't go with the dark green that has more yellow tone to it. I THINK the light green below is more the shade that goes with your dark green.

STILL, somehow it just doesn't seem to be ideal. I think there are GREAT sage greens that have a more neutral feel to them that you will like better once on the BIG picture.

What has helped me in the past is making a few black and white copies of your beach home, on regular paper, (on a copy machine) and start using colored pencils or markers in the shades you are thinking about, to REALLY get a feel for how the colors will look when covering a LARGE surface. You can hold your colored pictures up in front of your house and see how YOUR colors set you apart and blend you in with the neighboring houses. Personally, I have NOTHING against "standing out" IF you REALLY LOVE IT!