I think you need to stick with darker or cooler colors. Beige and green don't go with light gray too well. I'd try a blue gray color with the white trim, or I think maybe even paint the house white and have dark gray trim with black shutters. How old is your roof? If it needs to be replaced soon, maybe you can just hold off and repaint once you get a new roof. Just remember to not get a roof in a trendy color - go with a dark brown or a very dark gray - goes with everything.

We have the same problem. I know you posted this a loooong time ago but I'm curious what you ended up doing>

You will get a much better return on your home if you landscape it well rather than paint the brick, especially since you plan to only be in the home a short time before you sell. Definitely remove the shutters since your windows are not designed for them. See this brief article on shutters: https://www.lifeofanarchitect.com/residential-architecture-101-shutters/ Back to landscaping and hardscape (your walkway): below is one idea. You would need to get with a local nursery to find out the best plants to use once you have a landscape plan. You can get good ideas in the landscape sub-forum here on Houzz. Just post there for more ideas for your specific home.

Revere Pewter might be a possibility. Seapearl could be better as trim since it will likely lighten up quite a bit on the exterior. Whatever you decide, I would paint the garage door the same color as the siding to pull some focus off of it. Something light, like Seapearl or White Dove, could help pull the front door out of the shadows. That's the area I would want fo get as much attention as possible instead of the garage. It's hard to tell for sure...is your current siding kind of a gray/green? That's a shade that can work nicely with a red/brown roof color.