What isn't neutral in this interpretation of fishing boats? Maybe the blue stripe on the boat, bottom left,. Or is that only colorful compared to all the greys and browns that are so subtly represented? The sail in the center seems downright yellow until you look at it by itself. Certainly yellow is the dominant color, but it's more like a mud puddle than it is like a lemon.
Note how subtly the two distant hills display warm reddish brown in the nearer hill and blue-grey in the one that is farther away. Zbukvich understands how little color is required to show us what we actually see.
Most of what we see in the country and plenty of what we see in town is neutral. Let's try putting color back into these desaturated images. Just a little.