used wrong comparison

src/ImageSharp/MetaData/Profiles/ICC/Various/IccClut.cs

@@ -159,7 +159,7 @@ namespace ImageSharp
             Guard.MustBeBetweenOrEqualTo(this.OutputChannelCount, 1, 15, nameof(this.OutputChannelCount));
 
             bool isLengthDifferent = this.Values.Any(t => t.Length != this.OutputChannelCount);
-            Guard.IsTrue(isLengthDifferent, nameof(this.Values), "The number of output values varies");
+            Guard.IsFalse(isLengthDifferent, nameof(this.Values), "The number of output values varies");
 
             int length = 0;
             for (int i = 0; i < this.InputChannelCount; i++)
@@ -169,7 +169,7 @@ namespace ImageSharp
 
             length /= this.InputChannelCount;
 
-            Guard.IsTrue(this.Values.Length != length, nameof(this.Values), "Length of values array does not match the grid points");
+            Guard.IsTrue(this.Values.Length == length, nameof(this.Values), "Length of values array does not match the grid points");
         }
     }
 }