We describe the low energy excitations of the diquark condensates in the co
lor-flavor locked phase of QCD with three massless flavors, at high baryon
densities, in terms of a non-linear effective lagrangian. Such a lagrangian
is formally seen to correspond to the lagrangian for the hidden gauge symm
etry description of the effective low energy chiral lagrangian, the role of
the hidden symmetry being played by color. In particular, this agrees with
the conjecture that the light degrees of freedom of the two phases are in
correspondence to each other (complementarity). The discussion includes con
sideration of the breaking of Lorentz invariance in presence of matter dens
ity. (C) 1999 Published by Elsevier Science B.V. All rights reserved.