  Hadwiger's transversal theorem gives necessary and sufficient conditions for
the existence of a line transversal to a family of pairwise disjoint convex
sets in the plane. These conditions were subsequently generalized to hyperplane
transversals to general families of convex sets in $\mathbb{R}^d$ by Goodman,
Pollack, and Wenger. Here we show a colorful genealization of their theorem
which confirms a conjecture of Arocha, Bracho, and Montejano. The proof is
topological and uses the Borsuk-Ulam theorem.
