property Bar.HistogramCumulativeColors as Long
Specifies the number of colors that the histogram may show when it displays bars using cumulative type.

TypeDescription
Long A long expression that specifies the number of colors being used when a cumulative histogram is shown for the current bar. The value should be greater than 1, else the property has no effect. 
By default, the HistogramCumulativeColors property is 6. A cumulative histogram shows bars that generated the histogram using different colors. The cumulative histogram shows overloads or work-loads as well. The histogram shows cumulative values only if the HistogramCumulativeColors property is greater than 1, the HistogramType property includes the exHistCumulative flag. The HistogramCumulativeColor property specifies a color being used when showing cumulative histogram. Use the HistogramCumulativeOriginalColorBars property to specify whether the bars that generated the cumulative histogram change their original colors. The HistogramCumulativeShowLegend property specifies the index of the column to show the legend for the items being displayed in the cumulative histogram.

The following screen shot shows the cumulative histogram for HistogramCumulativeColors = 6, HistogramCumulativeOriginalColorBars = False

The following screen shot shows the cumulative histogram for HistogramCumulativeColors = 6, HistogramCumulativeOriginalColorBars = True

The following screen shot shows the cumulative histogram for HistogramCumulativeColors = 2, HistogramCumulativeOriginalColorBars = True

The following screen shot shows the cumulative histogram for HistogramCumulativeColors = 2, HistogramCumulativeOriginalColorBars = False

The following screen shot shows the cumulative histogram for HistogramCumulativeColors = 1 ( as it would not have effect )