  We report an implementation of a program for visualizing complex-valued
molecular orbitals. The orbital phase information is encoded on each of the
vertices of triangle meshes using the standard color wheel. Using this program,
we visualized the molecular orbitals for systems with spin-orbit couplings,
external magnetic fields, and complex absorbing potentials. Our work has not
only created visually attractive pictures, but also clearly demonstrated that
the phases of the complex-valued molecular orbitals carry rich chemical and
physical information of the system, which has often been unnoticed or
overlooked.
