  In this paper, we investigate the color-kinematics duality in nonlinear sigma
model (NLSM). We present explicit polynomial expressions for the kinematic
numerators (BCJ numerators). The calculation is done separately in two
parametrization schemes of the theory using Kawai-Lewellen-Tye relation
inspired technique, both lead to polynomial numerators. We summarize the
calculation in each case into a set of rules that generates BCJ numerators for
all multilplicities. In Cayley parametrization we find the numerator is
described by a particularly simple formula solely in terms of momentum kernel.
