I assume the architect thinks that white is what would be most appropriate. It certainly is used a great deal on highly contemporary architecture. Doing it in another color might well involve changing the outside material.

I recommend watching a few episodes of "Grand Design" on YouTube. TONS of really great contemporary architecture, with the exterior done in many different, and unusual materials (though some are specific to the UK where the houses are).

I like the white stucco with the wood lodge poles. Seems appropriate.

What does your architect suggest?

Do you have the colors he suggested and where are you located? That too would make a difference.

Where are you located? What is the exterior material(s) of your house? Are there other houses in your vicinity with similar architecture? If so, what color are they.

You cannot go wrong with a warm white color, much as shown in the first two photos?

Do you want the house to stand out in its surroundings, or to blend in?

I'd be curious to know where in the world this house is, and the colors of similar houses in the area, especially in the same neighborhood. Colorful, as in the Caribbean? Mostly all white, as in Greece?

When you (and your family?) imagine coming home to this new house, what does it look like?

It might be easiest to ask your architect to print out the house rendering in all the different color options you and he can imagine, and use that to help guide you.

so the house is located in Israel.
there is no one outstanding color with surrounding houses but most use relatively bright colors - shades of white, gray, light brown and etc.
lots of trees in the area, mainly pine trees and similar as tall trees.

I figured you probably were from your name. :) Elad, as I recall, most of the homes were painted shades of white, tan or gray? I think any of those would work and I certainly wouldn't do anything dark in your climate.

Depending on where in Israel would also determine the color? When I think of something like Jaffa or Jerusalem , I imagine more of that dusty beige color, but when I think of Tel Aviv, I see more of white or gray?