If a mom is very fair and dad is brown what will the child’s skin color be ?

It is a horse race.  My niece has brown eyes and brown hair and so does her husband.  The baby came so light and with blue eyes.  She looks exactly like grandma.  The DNA proved he was the daddy.

It will be Grey

The most likely possibility is somewhere in between.

There is no universal answer.  Genes are both dominant and recessive thus the child could be darker brown than Dad, even more fair than Mom or a mixture of the two.  More typically the darker genes are dominant, but there are no guarantees.

My kids are very light, just what i wanted.  Fair skin, dark hair.

Fairly brown.