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Gets or sets a theme color pattern for an Interior object.
Use this property to read the theme color applied to the pattern foreground of the interior. Pattern theme colors are typically used together with a patterned fill.
ThemeColor PatternThemeColor { get; set; }
Property PatternThemeColor As ThemeColor
IRange cell = worksheet.Range["A1"];
cell.Interior.Pattern = Pattern.LightDown;
cell.Interior.PatternThemeColor = ThemeColor.Accent1;
ThemeColor themeColor = cell.Interior.PatternThemeColor;