A radar area series is similar to a radar line series, except that the surrounded area is filled in a given color. For this reason, when showing more than one radar area series it is necessary to apply transparency to the color-filled region, so that it is possible to get a view of the overlapped series.

Color transparency can only be obtained with Java 1.2 and newer versions, therefore requiring that the Java plugin be installed. The transparency of a given color can be set by specifying the value of the color's alpha component, ranging from 0 to 255(00 to ff in hexa). Any of the parameters that take a sequency of hexadecimal values to specify a color can also be passed the alpha component, placed at the end of the hexadecimal string. Here is an example of transparency applied to the red color:
ff00006d

The following applet shows several attributes regarding an assessment applied to two individuals. Two transparent radar area series are used to show the attributes of each individual.