
plgcol0: Returns 8-bit RGB values for given color index from cmap0 

DESCRIPTION:

    This function is used in example 2. 

SYNOPSIS:

plgcol0(icol0, r, g, b)

ARGUMENTS:

    icol0 (PLINT, input) :    Index of desired cmap0 color. 

    r (PLINT *, output) :    Pointer to 8-bit red value. 

    g (PLINT *, output) :    Pointer to 8-bit green value. 

    b (PLINT *, output) :    Pointer to 8-bit blue value. 
