A volumetric display is capable of creating three- dimensional images in physical space by generating light emission, scattering or absorption points. We introduce two coloring methods of femtosecond-laser-driven aerial voxels for a volumetric display. One method extracts an arbitrary color from broadband emission of a voxel using two parabolic mirrors and a liquid-crystal color filter. The other uses scattering light of laser-excited aerial plasma. These methods...