I would post this here in the home decorating forum as this is more about the actual nuts and bolts of the windows.

You can it simple with colors but change it up with the materials and textures. All the colors can be the same but you could use paint for the large sections and find matching shingles for around the garage and the window area above the front door. It may be a little more expensive depending on your selections for materials however. I would lighten the house up with lighter trim, whether white or another color, because it will define each area of the home. I would match the front door and the garage door color. So in total you would have three different colors but only two different materials around the house.

Can't see enough of the porch to know what you are painting. The floor of the porch?

No grilles on the windows. This is a contemporary house. Don't go muddying it up style wise with craftsman features. One thing I would do is beef up that porch post. It looks too skinny. And you could go larger and more contemporary on the garage lights.

I agree, bigger light fixtures.

The main thing that stands out to me though is the garage looks like a big dark hole in the house. I would consider painting it the same shade as the siding in order to blend in better. Next, I would choose a nice crimson/cranberry red or cedar for the front door, which currently doesn't stand out.

Personally, I be going lighter (cream) vs. dark brown for my trim as well. I'd go cedar or cedar color for the porch.

I would trim back the foliage in front so the porch can actually be seen. Here it is in gray...