Town smell and color

I would like to ask how do the color and the smell which characterize a town form, what constitutes them and how can be unique and recognizable for every single town. It might be true that all cities along the sea have a hint of fishy, marine smell in their own odor, but then to this a mixture of the background mountains, the local food, the air humidity, and thousand other insignificant factors is added, which all together form the unique essence of the town.

Green pullover

I would like to ask how the colors that people were in normal days get decided. They must get decided somewhere, somehow, by someone, because the other morning, while waiting for the tram, I was observing the people and I could count many black pullovers, some brown ones, two red ones and two light blue ones, but no other color. Interesting enough, the two red ones were exactly the same red, which is not that easy to find. And the same can be said for the light blue ones. It seems that all people can choose the color of their clothes from a dozen of given ones, and any other color, for a while, disappears.