Why is soy sauce black?

Question

Why is soy sauce black?

Answer 1

soy sauce is black because it is fermented sauce.

There is soybeans, roasted grain, water and salt.

it is fermented with yeast, and fermented in urns under the sun.

Soy sauce gets it color from the fermented soybeans and roasted grain

Answer 2

I believe that during the fermentation process, the soy bean color shifts from tan to darker color when combined with salt.

Answer 3

Some brands do contain coloring but the black  or dark brown color is because the soybeans are fermented along with salt. This produces richer flavors that are described as Umami in Japanese.  

Answer 4

because it has ingredient such as black beans and soy beans

Answer 5

I have a friend whose family owns a soy sauce/vinegar factory. She told me that it was just food coloring. but maybe because their soy sauces are inexpensive.

the expensive soy sauces have natural color i think.

brewed from natural bacterial and fungal cultures.