+.B \-visual \fIvisual\fP
+Specify which visual to use. Legal values are the name of a visual class,
+or the id number (decimal or hex) of a specific visual.
+.TP 8
+.B \-colors \fIinteger\fP
+How many colors should be used (if possible). Default 64.
+.TP 8
+.B \-iterations \fIinteger\fP