diff --git a/ClosedXML/Excel/ConditionalFormats/Save/XLCFColorScaleConverter.cs b/ClosedXML/Excel/ConditionalFormats/Save/XLCFColorScaleConverter.cs
index 5d970d5..6f38667 100644
--- a/ClosedXML/Excel/ConditionalFormats/Save/XLCFColorScaleConverter.cs
+++ b/ClosedXML/Excel/ConditionalFormats/Save/XLCFColorScaleConverter.cs
@@ -7,20 +7,26 @@
 
 namespace ClosedXML.Excel
 {
-    internal class XLCFColorScaleConverter:IXLCFConverter
+    internal class XLCFColorScaleConverter : IXLCFConverter
     {
         public ConditionalFormattingRule Convert(IXLConditionalFormat cf, Int32 priority, XLWorkbook.SaveContext context)
         {
             var conditionalFormattingRule = new ConditionalFormattingRule { Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
-            
+
             var colorScale = new ColorScale();
-            for(Int32 i = 1; i <= cf.Values.Count; i++)
+            for (Int32 i = 1; i <= cf.ContentTypes.Count; i++)
             {
-                var conditionalFormatValueObject = new ConditionalFormatValueObject { Type = cf.ContentTypes[i].ToOpenXml(), Val = cf.Values[i].Value };
+                var type = cf.ContentTypes[i].ToOpenXml();
+                var val = (cf.Values.ContainsKey(i) && cf.Values[i] != null) ? cf.Values[i].Value : null;
+
+                var conditionalFormatValueObject = new ConditionalFormatValueObject { Type = type };
+                if (val != null)
+                    conditionalFormatValueObject.Val = val;
+
                 colorScale.Append(conditionalFormatValueObject);
             }
 
-            for (Int32 i = 1; i <= cf.Values.Count; i++)
+            for (Int32 i = 1; i <= cf.Colors.Count; i++)
             {
                 Color color = new Color { Rgb = cf.Colors[i].Color.ToHex() };
                 colorScale.Append(color);
diff --git a/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMax.cs b/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMax.cs
index 64614d8..7fdf8de 100644
--- a/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMax.cs
+++ b/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMax.cs
@@ -22,7 +22,9 @@
         }
         public void HighestValue(XLColor color)
         {
-            Maximum(XLCFContentType.Maximum, "0", color);
+            _conditionalFormat.Values.Add(null);
+            _conditionalFormat.Colors.Add(color);
+            _conditionalFormat.ContentTypes.Add(XLCFContentType.Maximum);
         }
     }
 }
diff --git a/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMid.cs b/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMid.cs
index 13c31ec..d868a73 100644
--- a/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMid.cs
+++ b/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMid.cs
@@ -30,7 +30,9 @@
         }
         public void HighestValue(XLColor color)
         {
-            Midpoint(XLCFContentType.Maximum, "0", color);
+            _conditionalFormat.Values.Initialize(null);
+            _conditionalFormat.Colors.Add(color);
+            _conditionalFormat.ContentTypes.Add(XLCFContentType.Maximum);
         }
     }
 }
diff --git a/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMin.cs b/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMin.cs
index 0c33c04..9f2b647 100644
--- a/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMin.cs
+++ b/ClosedXML/Excel/ConditionalFormats/XLCFColorScaleMin.cs
@@ -27,7 +27,10 @@
 
         public IXLCFColorScaleMid LowestValue(XLColor color)
         {
-            return Minimum(XLCFContentType.Minimum, "0", color);
+            _conditionalFormat.Values.Initialize(null);
+            _conditionalFormat.Colors.Initialize(color);
+            _conditionalFormat.ContentTypes.Initialize(XLCFContentType.Minimum);
+            return new XLCFColorScaleMid(_conditionalFormat);
         }
     }
 }
diff --git a/ClosedXML/Excel/XLWorkbook_Load.cs b/ClosedXML/Excel/XLWorkbook_Load.cs
index 6db27f6..3a1aeb3 100644
--- a/ClosedXML/Excel/XLWorkbook_Load.cs
+++ b/ClosedXML/Excel/XLWorkbook_Load.cs
@@ -1535,6 +1535,8 @@
                     conditionalFormat.ContentTypes.Add(c.Type.Value.ToClosedXml());
                 if (c.Val != null)
                     conditionalFormat.Values.Add(new XLFormula { Value = c.Val.Value });
+                else
+                    conditionalFormat.Values.Add(null);
 
                 if (c.GreaterThanOrEqual != null)
                     conditionalFormat.IconSetOperators.Add(c.GreaterThanOrEqual.Value ? XLCFIconSetOperator.EqualOrGreaterThan : XLCFIconSetOperator.GreaterThan);
diff --git a/ClosedXML_Examples/ConditionalFormatting/ConditionalFormatting.cs b/ClosedXML_Examples/ConditionalFormatting/ConditionalFormatting.cs
index efd53e8..5adc52f 100644
--- a/ClosedXML_Examples/ConditionalFormatting/ConditionalFormatting.cs
+++ b/ClosedXML_Examples/ConditionalFormatting/ConditionalFormatting.cs
@@ -18,7 +18,7 @@
 
             ws.RangeUsed().AddConditionalFormat().ColorScale()
                 .LowestValue(XLColor.Red)
-                .Midpoint(XLCFContentType.Percent, "50", XLColor.Yellow) 
+                .Midpoint(XLCFContentType.Percent, "50", XLColor.Yellow)
                 .HighestValue(XLColor.Green);
 
             workbook.SaveAs(filePath);
@@ -46,6 +46,26 @@
         }
     }
 
+    public class CFColorScaleMinimumMaximum : IXLExample
+    {
+        public void Create(String filePath)
+        {
+            var workbook = new XLWorkbook();
+            var ws = workbook.AddWorksheet("Sheet1");
+
+            ws.FirstCell().SetValue(1)
+                .CellBelow().SetValue(1)
+                .CellBelow().SetValue(2)
+                .CellBelow().SetValue(3);
+
+            ws.RangeUsed().AddConditionalFormat().ColorScale()
+                .LowestValue(XLColor.FromHtml("#FFFF7128"))
+                .HighestValue(XLColor.FromHtml("#FFFFEF9C"));
+
+            workbook.SaveAs(filePath);
+        }
+    }
+
     public class CFStartsWith : IXLExample
     {
         public void Create(String filePath)
@@ -567,7 +587,7 @@
             var range = ws.RangeUsed();
             range.AddConditionalFormat().WhenEquals("1").Font.SetBold();
             range.InsertRowsAbove(1);
-            
+
 
             workbook.SaveAs(filePath);
         }
@@ -589,7 +609,7 @@
             ws.RangeUsed().AddConditionalFormat().DataBar(XLColor.Red)
                 .LowestValue()
                 .HighestValue();
-                
+
             workbook.SaveAs(filePath);
         }
     }
diff --git a/ClosedXML_Tests/ClosedXML_Tests.csproj b/ClosedXML_Tests/ClosedXML_Tests.csproj
index 022bf3d..cd9b3c0 100644
--- a/ClosedXML_Tests/ClosedXML_Tests.csproj
+++ b/ClosedXML_Tests/ClosedXML_Tests.csproj
@@ -230,6 +230,7 @@
     <EmbeddedResource Include="Resource\Examples\Comments\AddingComments.xlsx" />
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFColorScaleLowHigh.xlsx" />
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFColorScaleLowMidHigh.xlsx" />
+    <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFColorScaleMinimumMaximum.xlsx" />
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFContains.xlsx" />
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFEndsWith.xlsx" />
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFEqualsNumber.xlsx" />
@@ -246,11 +247,11 @@
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFDataBar.xlsx" />
     <EmbeddedResource Include="Resource\Examples\ConditionalFormatting\CFIconSet.xlsx" />
     <EmbeddedResource Include="Resource\Examples\Ranges\SelectingRanges.xlsx" />
-    <None Include="packages.config" />
     <EmbeddedResource Include="Resource\Misc\TableWithCustomTheme.xlsx" />
     <EmbeddedResource Include="Resource\Examples\Ranges\AddingRowToTables.xlsx" />
     <EmbeddedResource Include="Resource\Examples\Misc\RightToLeft.xlsx" />
     <None Include="Resource\Misc\WorkbookProperties.xlsx" />
+    <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup />
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
@@ -261,4 +262,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>
\ No newline at end of file
diff --git a/ClosedXML_Tests/Examples/ConditionalFormattingTests.cs b/ClosedXML_Tests/Examples/ConditionalFormattingTests.cs
index 823ebeb..1ab8fe2 100644
--- a/ClosedXML_Tests/Examples/ConditionalFormattingTests.cs
+++ b/ClosedXML_Tests/Examples/ConditionalFormattingTests.cs
@@ -19,6 +19,12 @@
         }
 
         [Test]
+        public void CFColorScaleMinimumMaximum()
+        {
+            TestHelper.RunTestExample<CFColorScaleMinimumMaximum>(@"ConditionalFormatting\CFColorScaleMinimumMaximum.xlsx");
+        }
+
+        [Test]
         public void CFContains()
         {
             TestHelper.RunTestExample<CFContains>(@"ConditionalFormatting\CFContains.xlsx");
@@ -107,23 +113,5 @@
         {
             TestHelper.RunTestExample<CFMultipleConditions>(@"ConditionalFormatting\CFMultipleConditions.xlsx");
         }
-
-        //[Test]
-        //public void XXX()
-        //{
-        //    TestHelper.RunTestExample<XXX>(@"ConditionalFormatting\XXX.xlsx");
-        //}
-        //
-        //[Test]
-        //public void XXX()
-        //{
-        //    TestHelper.RunTestExample<XXX>(@"ConditionalFormatting\XXX.xlsx");
-        //}
-        //
-        //[Test]
-        //public void XXX()
-        //{
-        //    TestHelper.RunTestExample<XXX>(@"ConditionalFormatting\XXX.xlsx");
-        //}
     }
-}
\ No newline at end of file
+}
diff --git a/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleLowMidHigh.xlsx b/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleLowMidHigh.xlsx
index 640d65d..9bc4eb6 100644
--- a/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleLowMidHigh.xlsx
+++ b/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleLowMidHigh.xlsx
Binary files differ
diff --git a/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleMinimumMaximum.xlsx b/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleMinimumMaximum.xlsx
new file mode 100644
index 0000000..ef35d8b
--- /dev/null
+++ b/ClosedXML_Tests/Resource/Examples/ConditionalFormatting/CFColorScaleMinimumMaximum.xlsx
Binary files differ