But original poster just asked for color advice *here* LOL! I like the look of the house without shutters, but I like the idea of Navy shutters, maybe more than removing them, because you have a huge expanse of brick; Navy would both break it up and dress it up. It's a really neat house!

First, please don’t paint the brick. I think it will look very pretty with the gray siding. Food for thought with the darker roof. 1. The darker it is, the more heat it will absorb. 2. When people look at your home, the dark roof will pull their eyes up to it, if you go with a more medium gray for both the roof & the house it will blend in better. Fashia should be white. Just my preference and what we did with our home. Trim color can be white, but you could also branch out a bit and maybe use a dark gray for contrast. Does your brick have gray in it? If it does, try matching your paint color with a gray from the brick. For a visual reference, the pics below show samples of roof / paint color combinations. Dark roof, light gray, see what I mean about the dark roof pulling your eye to it? In this picture, the house gets lost and the roof is all you really see. Light gray roof & paint, with white trim A dark roof w/darker paint color makes it blend better. Two tone darker trim. The earth tones are pretty too.

Here's what I recommend for your home. Embrace the lovely California Santa Barbara style for your home. Your home can be very special with a few adjustments. All the window frames should be bronze. Either replace them or paint them. Add a wood or faux wood wall pergola over your garage door and start bougainvillea trailing from the trellis Either select a wood grain garage door or have it painted to match your front door If you want to spend more money select Mexican tiles to install on the risers of your stairs for more interest. Your front yard needs some serious landscaping. No lawn IMO. Maybe ferns and a palm tree. Ferns in the front yard. Mexican planters are a must. You want this look for your home IMO. The paint color is not your issue. Landscaping is.

https://www.yourownarchitect.com/how-to-choose-a-roof-color-for-brick-houses/