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<H3><A NAME="4_8_1">4.8.1 Adjusting the transparency</A></H3>
<P> From version 1.10 JpGraph also supports the use of Alpha Blending
 together with GD2.x This lets you specify how much of the underlying
 color should be visible. You specify the amount of transparency for a
 color by adding an extra parameter to the color specification separated
 by an '@' (at) character.</P>
<P> For example to specify a red color which is 40% transparent you
 write<DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
&nbsp;SetColor</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
&quot;red@0.4&quot;</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB"></FONT>
</FONT></CODE></DIV></P>
<P> or to specify 90% transparancy you write<DIV class="phpscript"><CODE>
<FONT color="#000000"> <FONT color="#0000BB">&nbsp;SetColor</FONT><FONT color="#007700">
(</FONT><FONT color="#DD0000">&quot;red@0.9&quot;</FONT><FONT color="#007700">);</FONT><FONT
color="#0000BB"></FONT></FONT></CODE></DIV></P>
<P> Below is an example of how a bar graph with a background image can
 make use of transparency
<!--?
Example('alphabarex1','Using alpha blending in a bar graph');
?-->
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