There are paint programs available for free online. Sherwin Williams has one. Upload a photo and try a bunch of combinations.

Here is a link that might be useful: Sherwin Williams Paint Visualizer

I'd start with a dark valued roof, using an "architectural" grade shingle (has greater thickness and surface depth than a standard shingle).

Thereafter, I'd unify and match the door and window trim colors. I'd also consider repainting all of the siding so that the overall house appearance is unified and harmonous, rather than the changeout of just a few items such as shutters and garage door.

A color scheme I like with warm brick is a grey-green siding with muted red window frames and door frames. Front door could match or be a harmonious accent color, ie, yellow, sienna, etc. Garage door replacement could have a strip of rectangular windows at the top panel of the door, or simply be a solid door. Garage doors are so large that they tend to visually dominate the house elevation where they are located, so the best bet is to paint them a dark valued hue that recedes and does not call attention to itself. In the color scheme suggested above, it could be a neutral grey or dark green. Using a computer-based color selector, suggested above, is a good idea. Good luck!

I just posted this pic from houzz.com for another person....a nice combo you might reverse by painting the trim and shutters in the greige tones.

[Traditional Exterior design[(https://www.houzz.com/photos/traditional-exterior-home-ideas-phbr1-bp~t_736~s_2107) by Dc Metro Interior Designer Grossmueller's Design Consultants

If it were me, I love the combo of white brick and a dark taupe color on the siding. Then black shutters and a black roof (or dark gray).

Thanks everyone for your thoughtful ideas! I don't know if painting the siding is in the time or money budget for this year yet, funny how things add up :) Will definitely use a visualizer since I am weak in that area haha