Color palettes for gnuplot
In order to use a palette load it at the beginning of your gnuplot file via
palette by the name of your desired palette, which are listed below.
Note, that this will not only define a palette, but also overwrite the first eight line styles. If you want to use your own line styles, you have to define them after the above command.
If you need more help, have a look at this example.
If you look for a good standard palette try
moreland.pal, which comes from