A few things which look “off” in your photos, but because you are not showing us al of the space, it is hard to judge.

As is, your chandelier is hung too high and looks too big for the table. (1/2 size of table and around 34” off table top is preferred).

The table looks as if it should be turned.

The navy chairs are side chairs and not host chairs. Suggest two cane chairs on either side of table and a fabric slope arm chairs for the ends.

Window need panels.

I would not paint an accent wall. If you want blue, paint above the chair rail.

Art for walls:

Not sure if this is practical but I would try to get all blue chairs. I feel like the other ones you have , although they’re reallly really beautiful they look a drop outdoorsy/ patio like. Maybe you can put them outside... do you have a good space for that?

I would remove all art and put a stunning light blue wallpaper just on the upper portion of the wall and maybe add some more molding to the bottom. Lower the light if possible!!