Charming house but the shutters do not add to the charm. Dark grey with the white trim, no shutters, would look sharp. Which dark grey would be important so the siding doesn't match the roof.

Remove the shutters, dark gray with white trim would be nice, dark gray with black windows would be dreary.

And here's an entire new take with the black windows you'd want... Black windows, white siding & trim, I've added a railing to the porch.