You have options!

Consider a wood tone for your garage doors for added warmth to your palette. Another way to add warmth would be to incorporate stained grade posts along the porch as opposed to the white paint grade posts pictured.

An additional option for the garage door would be to pull from the charcoal roof color for a cohesive element that isn't as bright as the white or as washed out as the field color.

Best of luck with your project!

have you thought about navy for the siding? I've just re-designed a home with a navy board and batten siding, whitish/cream brick, cedar beams and white trim and it looks really nice! the home was a late 60s ranch, with a similar silhouette to the one you posted.