  We consider a composite model in which the standard model fermions are bound
states of elementary spin $\frac{1}{2}$ particles, the preons, situated in the
conjugate product representation of the color group. In this framework we
propose and analyze two mass Ansatze one for the leptons, the other one for the
quarks, based on mass formulae of the Gell-Mann Okubo type. We find that these
mass Ansatze can give an adequate description of the known standard model
fermion masses.
