  We explore the structure of shadow for a Kerr-de Sitter black hole with a
non-magnetized, pressureless plasma surrounding it. Specific plasma
distributions are considered to separate the Hamilton-Jacobi equation and find
the photon regions. An analytic formula describing the boundary curve of the
shadow for such a black hole in an expanding universe for an observer at any
finite point outside the horizon is derived. We observe deviations which are
further explored by calculating the curvature radius at a particular point for
such structures in the presence and absence of plasma and calculate the
diameter of the shadow.
