ions.</p>

<blockquote>
<dl>
<dt><b><tt>-dBackgroundColor=</tt></b><b><em>16#RRGGBB</em></b> (RGB color, default white = 16#ffffff)
<dd>For the <tt>pngalpha</tt> device only,
set the suggested background color in the PNG bKGD chunk.
When a program reading a PNG file does not support alpha
transparency, the PNG library converts the image using
either a background color if supplied by the program
or the bKGD chunk.
One common web browser has this problem, so when using
<b><tt>&lt;body bgcolor="CCCC00"&gt;</tt