(PHP 4, PECL pdflib >= 1.0.0)
PDF_setrgbcolor — Set fill and stroke rgb color values [deprecated]
$p
    , float $red
    , float $green
    , float $blue
    )
   Sets the current fill and stroke color to the supplied RGB values.
   Returns TRUE on success or FALSE on failure.
  
This function is deprecated since PDFlib version 4, use PDF_setcolor() instead.