`plgcol0a`: Returns 8-bit RGB values and PLFLT alpha transparency value for given color index from cmap0
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#### `plgcol0a`: Returns 8-bit RGB values and PLFLT alpha transparency value for given color index from cmap0

`plgcol0a (` | icol0,
| r,
| g,
| b,
| alpha`)`;

Returns 8-bit RGB values (0-255) and PLFLT alpha transparency value (0.0-1.0) for given color from cmap0 (see the section called “Color Map0”). Values are negative if an invalid color id is given.

`icol0` (``PLINT``, input)

  Index of desired cmap0 color.

`r` (``PLINT_NC_SCALAR``, output)

  Returned value of the red intensity in the range from 0 to 255.

`g` (``PLINT_NC_SCALAR``, output)

  Returned value of the green intensity in the range from 0 to 255.

`b` (``PLINT_NC_SCALAR``, output)

  Returned value of the blue intensity in the range from 0 to 255.

`alpha` (``PLFLT_NC_SCALAR``, output)

  Returned value of the alpha transparency in the range from (0.0-1.0).

Redacted form: `plgcola(r, g, b)`

This function is used in example 30.

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`plgcol0`: Returns 8-bit RGB values for given color index from cmap0 | Home | `plgcolbg`: Returns the background color (cmap0[0]) by 8-bit RGB value