  It is well-known that a knot is Fox $n$-colorable for a prime $n$ if and only
if the knot group admits a surjective homomorphism to the dihedral group of
degree $n$. However, this is not the case for links with two or more
components. In this paper, we introduce a two-tone coloring on a link diagram,
and give a condition for links so that the link groups admit surjective
representations to the dihedral groups. In particular, it is shown that the
link group of any link with at least 3 components admits a surjective
homomorphism to the dihedral group of arbitrary degree.
