  Neutron stars may harbour the true ground state of matter in the form of
strange quark matter. If present, this type of matter is expected to be a color
superconductor, a consequence of quark pairing with respect to the color/flavor
degrees of freedom. The stellar magnetic field threading the quark core becomes
a color-magnetic admixture and, in the event that superconductivity is of type
II, leads to the formation of color-magnetic vortices. In this Letter we show
that the volume-averaged color-magnetic vortex tension force should naturally
lead to a significant degree of non-axisymmetry in systems like radio pulsars.
We show that gravitational radiation from such color-magnetic `mountains' in
young pulsars like the Crab and Vela could be observable by the future Einstein
Telescope, thus becoming a probe of paired quark matter in neutron stars. The
detectability threshold can be pushed up toward the sensitivity level of
Advanced LIGO if we invoke an interior magnetic field about a factor ten
stronger than the surface polar field.
