Plot with boxes, color setting for one box

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All,

I use Gnuplot for plotting a histogram-like graph. In my graph one column, e.g. column 6 should get another color like the other columns. This means that I want to change the color only for one (or two) columns, all other colums should have the same color Is this possible by using one input file like below? If I use for the seperate column an separate input data file, this works, but I would like to know if it possible by using only one input file.

Thanks for your help
Christian

Here are informations, how I actually plot the graph:

The data from my input file (Testdatei_Ergebnisse.csv) is as follows:
1 4
2 10
3 7
4 8
5 2
6 8
7 2
8 1
9 0

I plot this with this settings (Gnuplot 4.2.5):
...
set boxwidth 0.8 relative
set style fill solid 1.0
plot "Testdatei_Ergebnisse.csv" using 1:2 with boxes linecolor rgb "blue" title "Frequency"
...