  If dark matter (DM) contains equal numbers of u,d,s quarks, the ratio of DM
and ordinary matter densities is shown to follow from the Boltzmann
distribution in the Quark Gluon Plasma. For sexaquark DM in the 1860-1880 MeV
mass range (assuring sexaquark and nuclear stability) and quark masses and
transition temperature from lattice QCD, the observed Omega_{DM}/Omega_b = 5.3
is in the predicted range, with <~ 15% uncertainty. The prediction is
insensitive to the current form of DM, which could be sexaquarks, strange quark
matter nuggets, primordial black holes from their collapse, or a mixture of
these.
