color - derive #rrggbb colors for prompt and UI style configuration.
color dim color percent color blend color color percent
color derives #rrggbb colors for prompt and UI style configuration. color dim blends a color toward black. color blend blends the first color toward the second color.
color operands are truecolor values in #rrggbb form. percent is a blend percentage.
Zero on success and two for invalid input. Invalid input writes a diagnostic to standard error and writes nothing to standard output.