We opted to go with unpainted hardie and then paint it the colour we wanted. This gave us more options and also meant easier install. Grays are really tricky and lighting matters and undertone. You can order samples from hardie but they are small. I highly recommend painting large pieces of cardboard or poster board and placing them on various sides of your home at different times of day. We ended up with Benjamin Moore Storm as our house colour and love it.

I like deep ocean. You could keep the belly bands, just make them a few shades lighter or darker than the siding. That will keep them as a feature, but the contrast will be much subtler.

I'm not a gray person but I like the Aged Pewter. I would remove the shutters - not sized right and shouldn't be on double windows. The yellow is bright, and I usually like the door to match the storm door but not sure that would work on your home. Also, consider having the roof cleaned.

IMO they all look basically the same as what you have and remove those shutters they do not belong on any of the windows . Ther eis no way for me that a door color would drive the bus ever .A new garage door would be nice too

gray is gray... Paint the garage door to match the siding color you choose.

Remove the shutters, they don't fit the windows.

I would remove the shutters and actually really like Iron Grey! As far as the yellow haters go, I love yellow, it’s my favorite color. Your yellow is bold, high contrast, and a big sunny welcome ☀️

I like yellow but I sure would not choose an expensive change to go with one small item that is yellow . Get a siding color you love IMO something different than what you have for a real change then many shades of yellow choose one for the door color.