My recommendation is not to paint the house blue. It is too personal and may not appeal to buyers.

The color of the driveway, IMO, needs to be included in your color scheme.. It is quite prominent and leads the eye right up to garage door. I suggest you paint all the trim and front door in cream and the body in a darker tone.

Paint in classic colors; colors with which the buyer can work.

Great opportunity to add some curb appeal. I suggest you buy a test pot of paint and put a large swath on the house to see how you like it. There is very little trim, partially due to only having two windows on the front. Not sure you'll get that much contrast with white trim, hence the test pot.

With the lack of windows on the front, you may want to upgrade your garage door to something with a little more character. Paint your front door a bright color so it can be seen from the street. You could further the curb appeal by widening the step to match the width of the porch, add more prominent house numbers that may be seen from the street, transplant the tree to a more suitable location, add low growing shrubbery to the front of the house. A couple of planters by the front porch will brighten the entry also.

Good luck.

Blue is difficult. Agree with the pp that testing the blue on your home will be the best way to avoid a blueberry house color.

You need to see very large swaths of paint samples on the house or on a board you can move around to see on every side.

Attached are a couple of dark blues for you to get test samples. Some even have the brownish roof. You can match James Hardie siding colors too at the paint store by giving the name of the siding color if you choose that direction.

^This home has Evening Blue by James Hardie which can be matched by Sherwin Williams or Benjamin Moore to achieve this color. The advantage of using a color like this is you can go to a house with it locally (hopefully) to see what it looks like IRL.

^No color specified, but this roof is similar to your roof (on this side of the monitor).
^This one above is Sherwin Williams Slate Tile
^No color name or number in the more info section
^No color name or number in the more info section
^This one is SW Slate Tile

For those interested or for those in the future with the same question. Before and after: SW Sea Serpent on House, SW Pure White on Trim and garage. So happy with how it turned out!