  The influence of a constant uniform external chromomagnetic field $H$ on the
formation of color superconductivity has been investigated. The consideration
was performed in the framework of a (2+1)-dimensional Nambu--Jona-Lasinio model
with two different four-fermionic structures responsible for $<\bar qq>$ and
diquark $<qq>$ condensates. In particular, it was shown that there exists a
critical value $H_c$ of the external chromomagnetic field such that at $H>H_c$
a nonvanishing diquark condensate is dynamically created (the so-called
chromomagnetic catalysis effect of color superconductivity). Moreover, external
chromomagnetic fields may in some cases enhance the diquark condensate of color
superconductivity.
