  The relic cosmological abundance of stable or long-lived neutral colored
particles gets reduced by about a few orders of magnitude by annihilations that
occur after QCD confinement. We compute the abundance and the cosmological
bounds on relic gluinos. The same post-confinement effect strongly enhances
co-annihilations with a lighter Dark Matter particle, provided that their mass
difference is below a few GeV. Charged colored particles (such as stops) can
instead form baryons, which can be (quasi)stable in some models.
