  The recent observation of a hadronic resonance $d^*$ in the proton-neutron
system with isospin $I = 0$ and spin-parity $J^P = 3^+$ raises the possibility
of producing other novel six-quark dibaryon configurations allowed by QCD. A
dramatic example of an exotic six-quark color-singlet system is the charge
$Q=+4$, isospin I=3, $I^z=+3$ $|uuuuuu>$ state which couples strongly to
$\Delta^{++}$ + $\Delta^{++} .$ The width and decay properties of such
six-quark resonances could be regarded as manifestations of "hidden-color"
six-quark configurations, a first-principle prediction of QCD -- SU(3)-color
gauge theory for the deuteron distribution amplitude. Other implications and
possible future experiments are discussed.
