First define a spot color as usual in Illustrator.
To apply it in a Datylon chart, select the chart, go to the property you want to change and hit Color. You’ll find the spot colors in the list under Solid > Color > ColorSwatches.
Improved data and categorical label behavior for multi series bar charts.
When Smart Labels is disabled, the bar chart labels are positioned exactly like set in the first section of Data Labels (or Category Labels) independent on negative/positive data values or the available space on the bars.
Smart Labels enabled, positions the labels taking available space and negative/positive data values into account. Also the offset direction depends on those factors.
With Smart Labels enables, some properties like Horizontal Alignment are ignored and overruled by the Smart Labels settings.
Improved user interface:
Link colors: the color of data marks & labels and direct labels can be linked to the color of a bar, line, area, scatter mark or pie slice.