Hi @David Thielen ,
The defaults for a style number are what you see in the style.xml and color.xml for the chart using that style (redundancy for backwards compatibility). So, creating a new chart with a given style should produce style/color parts where you can see the details.
If there is no style/color parts for a chart, then from MS-ODRAWXML 2.7.3.5:
2.7.3.5 CT_Style
Target namespace: http://schemas.microsoft.com/office/drawing/2007/8/2/chart
Referenced by: style
A complex type that specifies a chart style ([ISO/IEC29500-1:2016] section 21.2).
If this element exists, the CT_Style element ([ISO/IEC29500-4:2016] section A.5.1) that is a
descendent of the CT_ChartSpace element ([ISO/IEC29500-4:2016] section A.5.1) that is the
ancestor of this element MUST exist, SHOULD<87> be ignored, and MUST have a val attribute equal
to the val attribute of this element minus 100.
Attributes:
val: An ST_Style attribute that specifies a chart style.
What's happening here is that if there is no style/colors parts then the values are taken from ISO/IEC 29500-1:2016 21.2.3.46 ST_Style (Style) using the value minus 100. E.g. <c14:style val="102"/> maps to <c:style val="2"/> if there are no style/colors parts.
Best,
Mike