I'm in agreement with you that for your situation something of low contrast would be best. You could have the shutters more or less match the house color (or even go ligher, say a cream color) or a soft green with yellow tones to it. I would let the landscaping provide the color (and I'm so hoping you're not doing grass in your tropical environment) and let it be the lush counterpoint to your cool-looking light colored house. I think it would be beautiful.

Well, we ordered our coach lights today. We will soon order some for the back of the house. Here is what we chose. I appreciate the assistance given. The one below is for the front of the house. It is in oil rubbed bronze -- much browner than in the picture. We ordered two larger ones to go beside the front door, and 3 medium ones (2 on either side of garage door, an one at the garage man door). We concluded that we need coach lights that did not extend too far (not deep ones), so we had to go a different direction. These lights have built in LED lights. The lights are made by Artcraft. Here is the ones we are ordering for the back of the house. There are 4 total along the back which is all one plane (not jogs out).

The existing (sage?) looks nice.

Oh and I should add that this isn’t how the landscaping currently looks. We had just removed overgrown bushes, which have now been replaced. This is just the only photo I have on hand at the moment.