plscol0a - Set 8-bit RGB values and PLFLT alpha transparency value for given cmap0 color index

icol0 (PLINT(3plplot), input)
              Color  index.   Must  be  less  than  the  maximum  number  of colors (which is set by default, by
              plscmap0n(3plplot), or even by plscmap0(3plplot)).

       r (PLINT(3plplot), input)
              Unsigned 8-bit integer (0-255) representing the degree of red in the color.

       g (PLINT(3plplot), input)
              Unsigned 8-bit integer (0-255) representing the degree of green in the color.

       b (PLINT(3plplot), input)
              Unsigned 8-bit integer (0-255) representing the degree of blue in the color.

       alpha (PLFLT(3plplot), input)
              Value of the alpha transparency in the range (0.0-1.0).

       Many developers (who are credited at http://plplot.org/credits.php) have contributed to PLplot  over  its
       long history.

       Set  8-bit  RGB  value  and PLFLT alpha transparency value for given cmap0 (see the PLplot documentation)
       index.  Overwrites the previous color value for the given  index  and,  thus,  does  not  result  in  any
       additional allocation of space for colors.

       This function is used in example 30.

plscol0a - Set 8-bit RGB values and PLFLT alpha transparency value for given cmap0 color index

       PLplot documentation at http://plplot.org/documentation.php.

                                                   July, 2025                                  PLSCOL0A(3plplot)

plscol0a(icol0, r, g, b, alpha)