Color of series is not changing according to data for Bar chart

I am creating dynamic bar chart based on the data getting from the database. The number of series and the color corresponding to each series get changed according to the data fetched from the database.

My problem is if one particular color(say red) is coming consecutively from the database and then another color(say green)for series, then on display of bar chart two series bars appears in red (which is correct)and third one is also display as red (it should be show in green).

If none of the series color repeats consecutively charts runs fine.

please help me.

Thanks in advance.