  We consider cosmological consequences of the spontaneous breaking of a global
symmetry that is anomalous under technicolor interactions, leading to the
emergence of a light axion-like particle. Avoiding overclosure of the universe
by such axions yields the upper bound $f_a \lsim 10^{10}$ GeV on the symmetry
breaking scale, corresponding to keV-scale axions. However, diffuse x-ray
background data typically require larger values of $f_a$. The overclosure and
x-ray bounds can be reconciled if the axion initial amplitude of oscillations
$A_i \sim f_a/10$. In this case, a viable axionic dark matter candidate with a
mass in the 50-100 eV range emerges. The detection of this type of dark matter
may pose a challenge.
