[haskell-gnuplot] Changing histogram colors?

[Dmitri O.Kondratiev]

Hi,
I am trying to change default RGB colors of histogram columns to Green,
Yellow and Blue.
How to do this? I can't find anywhere a simple example.
Please, help.
I have:

reset
set title "Three sequences"
set datafile missing "-"
set key noenhanced
set auto x
set yrange [0:250]
set style fill pattern
set style fill solid border -1
set style data histogram
plot "nt2dat.txt" u 2:xtic(5) t "Best Fit", "" u 3 t "In Class", "" u 4 t
"Other"
pause -1 "<cr> to exit"

How to change 'plot' command to have Green, Yellow and Blue colors for
histogram columns?

Thanks!
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