Suggest me a better replacement for Column Chart(snapshort attached)

I am using column chart of vaadin visualization add on. But the problem with using this is that i am not able to get columns in different colors for different partitions. Every time I create a new partition the colors get repeated for that partition.
N if I use code like this :
cc.add(“North/East Region”, new double{21, 10, 18, 22, 4});
cc.add(“South/West Region”, new double{0,0,0,0,0, 20,30,10,15,8,10,17});
then the width of columns gets very much narrow.
Plz suggest me an alternative.