I'm trying to save a stacked column chart with white data labels (position
inside centered) as custom chart type template in Excel 2007. All other text
in the chart is black.

If I insert new chart based on this template the data labels are in white.
However, if I add more data series, the data labels appear in black. I would
like to have the data labels always in white (without manually having to
reformat them).

Is there a way to achieve this? Thanks for any hints.
Luca