2.4.3.2 msvThemeAccentColor
The msvThemeAccentColor element is a Row_Type element that specifies a fixed theme or dynamic theme property. It MUST have a Value child element of the type Cell_Type.
The Value child element is a vColor that specifies the AccentColor property of a custom fixed color scheme as specified in vThemeString or the AccentColor property of a custom dynamic theme color scheme as specified in vDynamicThemeString.