Set colors of all bars
Turn on multicolor
Set a color per bar
Set bar colors in multiseries chart
Set the background and foreground color

Set the color of the bars.

<applet code=com.objectplanet.chart.BarChartApplet
 archive=chart.jar width=300 height=200>
<param name=sampleValues value="10,20,30,40,50">
<param name=sampleColors value="red">
</applet>

Display individual colors per bar.

<applet code=com.objectplanet.chart.BarChartApplet
 archive=chart.jar width=300 height=200>
<param name=sampleValues value="10,20,30,40,50">
<param name=multiColorOn value="true">
</applet>

Set the colors of each bar.

<applet code=com.objectplanet.chart.BarChartApplet
 archive=chart.jar width=300 height=200>
<param name=sampleValues value="10,20,30,40,50">
<param name=multiColorOn value="true">
<param name=sampleColors value="red, orange, blue, #c0ffab, #00ab00">
</applet>

Set the colors of the bars when multiple series are used.

<applet code=com.objectplanet.chart.BarChartApplet
 archive=chart.jar width=300 height=200>
<param name=seriesCount value=3>
<param name=sampleValues_0 value="10,20,30,40,50">
<param name=sampleValues_1 value="20,30,40,50,60">
<param name=sampleValues_2 value="30,40,50,60,70">
<param name=barWidth value=0.6>
<param name=multiColorOn value="true">
<param name=sampleColors value="yellow, orange, red">
</applet>

Set the background and foreground color.

<applet code=com.objectplanet.chart.BarChartApplet
 archive=chart.jar width=300 height=200>
<param name=sampleValues value="10,20,30,40,50">
<param name=foreground value=yellow>
<param name=chartForeground value=white>
<param name=background value=black>
<param name=chartBackground value="#444444">
<param name=chartTitle value="chart colors">
</applet>