diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Style/Colors/XLColor_Internal.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Style/Colors/XLColor_Internal.cs
index c00a463..003742c 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Style/Colors/XLColor_Internal.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Style/Colors/XLColor_Internal.cs
@@ -50,7 +50,7 @@
         private XLColor(XLThemeColor themeColor)
         {
             _themeColor = themeColor;
-            _themeTint = 1;
+            _themeTint = 0;
             _hashCode = 7 ^ _themeColor.GetHashCode() ^ _themeTint.GetHashCode();
             HasValue = true;
             _colorType = XLColorType.Theme;
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index cebe6ec..0e66171 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -2967,7 +2967,7 @@
                 else
                 {
                     foregroundColor.Theme = (UInt32)fillInfo.Fill.PatternColor.ThemeColor;
-                    if (fillInfo.Fill.PatternColor.ThemeTint != 1)
+                    if (fillInfo.Fill.PatternColor.ThemeTint != 0)
                         foregroundColor.Tint = fillInfo.Fill.PatternColor.ThemeTint;
                 }
                 patternFill.AppendChild(foregroundColor);
@@ -2983,7 +2983,7 @@
                 else
                 {
                     backgroundColor.Theme = (UInt32)fillInfo.Fill.PatternBackgroundColor.ThemeColor;
-                    if (fillInfo.Fill.PatternBackgroundColor.ThemeTint != 1)
+                    if (fillInfo.Fill.PatternBackgroundColor.ThemeTint != 0)
                         backgroundColor.Tint = fillInfo.Fill.PatternBackgroundColor.ThemeTint;
                 }
                 patternFill.AppendChild(backgroundColor);
@@ -3108,7 +3108,7 @@
             else
             {
                 color.Theme = (UInt32)xlColor.ThemeColor;
-                if (xlColor.ThemeTint != 1)
+                if (xlColor.ThemeTint != 0)
                     color.Tint = xlColor.ThemeTint;
             }
             return color;
@@ -3124,7 +3124,7 @@
             else
             {
                 color.Theme = (UInt32)xlColor.ThemeColor;
-                if (xlColor.ThemeTint != 1)
+                if (xlColor.ThemeTint != 0)
                     color.Tint = xlColor.ThemeTint;
             }
             return color;
diff --git a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
index a209a19..dbd8023 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
@@ -15,20 +15,11 @@
     {
         private static void Main(string[] args)
         {
-            var wbSource = new XLWorkbook(@"c:\temp\original.xlsm");
+            
             var wbTarget = new XLWorkbook();
-
-            foreach (var ws in wbSource.Worksheets)
-            {
-                wbTarget.AddWorksheet(ws);
-            }
-
-            foreach (var r in wbSource.NamedRanges)
-            {
-                wbTarget.NamedRanges.Add(r.Name, r.Ranges);
-            }
-
-            wbTarget.SaveAs(@"c:\temp\saved.xlsm");
+            var ws = wbTarget.AddWorksheet("Sheet1");
+            ws.FirstCell().Style.Fill.BackgroundColor = XLColor.FromTheme(XLThemeColor.Accent1);
+            wbTarget.SaveAs(@"c:\temp\saved.xlsx");
             Console.WriteLine("Done");
             //Console.ReadLine();
         }