Consider running bands of trim where I show the red and blue lines. Red one 1x10, blue 1x8, and continue the blue one as a frieze (trim top of wall, just under the soffit).

Choose a wide -- maybe 12" lap siding below the red line and paint it dark.

Choose a narrower lap siding -- 8" to wrap the 1st floor level.

I'd use shakes/shingles in the gables (above the blue line).

Paint above the red line all the same color -- a bit lighter than below that line.

I'd skip the stone, and no red -- you don't want people thinking it's a fire station.

Also, check the dimensions where I've marked the blue lines on the porch roof. The right side looks larger.

You really need to model this in 3D so you can experiment with siding options and colors.

You would like the windows to be black or they are black as I see some installed? If you use the stone, use it only as a water table and ALL the way around the house (water table ALL 4-sides) or leave it off entirely. Use a 10" cedar clapboard.

You can use different widths of siding to make it more interesting. We did this:

Which was based on some Hardie inspo pics from here:

https://craftsmanschoice.com/minnetonka-mn-james-hardie-siding-iron-gray-with-replacement-door/

I'm not saying do gray :) ... just that using a pattern can give it nice visual appeal and still keep it one color.