  We present an efficient cooling scheme for fermionic $^{40}{\text{K}}$ atoms,
using laser light red and blue detuned with respect to the $\mathcal{D}2$ and
$\mathcal{D}1$ principle flourescence lines, respectively. The cooling scheme
is found to significantly increase the saturation level for loading of a
$^{40}{\text{K}}$ magneto-optical trap (MOT), resulting in increased atom
numbers or decreased cycle times. While the attainable $^{40}{\text{K}}$ atom
number is approximately doubled if exclusively $^{40}{\text{K}}$ atoms are
cooled, the scheme is particularly powerful for dual-species MOTs, for example,
if $^{40}{\text{K}}$ and $^{87}{\text{Rb}}$ atoms are cooled simultaneously in
the same MOT configuration. The typical atom losses due to light-assisted
hetero-nuclear collisions between $^{40}{\text{K}}$ and $^{87}{\text{Rb}}$ seem
to be reduced giving rise to a threefold improvement of the $^{40}{\text{K}}$
atom number as compared to that in a conventional dual-species MOT, operating
merely with $\mathcal{D}2$ light. Our scheme can be a useful extension to most
dual-species experiments, aiming to reach simultaneous degeneracy of both
species.
