Why is dirt almost always a brown color?

Question

Why is dirt almost always a brown color?

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Answer 1

You ever notice how brown isn’t on the color wheel? There is no brown in the rainbow. It’s because brown is what they call a tertiary color. You gotta mix at least three colors together to get it. Dirt is a mix of all sorts of different elements, minerals, organic compounds. So the result, is generally some hue of brown.