Would it be possible to have a child with red hair, two with blond, and one with dark brown, if your husband was red-haired, you had dark brown hair, and both of you have blood family that are blond?
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Blonde hair is recessive however red hair is a recessive mutation of the MCR1 gene but shouldn't be thought of as simply as recessive. Hair is generally thought of by biologists in two categories, melanized (pretty much everything except blonde) and non melanized (blonde).
However, hair color comes in hundreds of different natural shades because hair color is said to be polygenic, that is it is determined by several different genes.
What you described in your question is exactly the answer to your question. You have blondes in your family, yet have brown hair. Your husband has red hair but also has blonde in his family. Hair color can vary greatly in families so it is completely normal and possible to have several different hair colors in a single generation.
However, hair color comes in hundreds of different natural shades because hair color is said to be polygenic, that is it is determined by several different genes.
What you described in your question is exactly the answer to your question. You have blondes in your family, yet have brown hair. Your husband has red hair but also has blonde in his family. Hair color can vary greatly in families so it is completely normal and possible to have several different hair colors in a single generation.