diff --git a/src/MaterialDesignDemo.Shared/Converters/BrushToHexConverter.cs b/src/MaterialDesignDemo.Shared/Converters/BrushToHexConverter.cs
index 5e196432fe..16b77a589a 100644
--- a/src/MaterialDesignDemo.Shared/Converters/BrushToHexConverter.cs
+++ b/src/MaterialDesignDemo.Shared/Converters/BrushToHexConverter.cs
@@ -8,10 +8,9 @@ public class BrushToHexConverter : IValueConverter
 {
     public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
     {
-        if (value is null) return null;
+        if (value is not SolidColorBrush brush) return null;
 
         static string lowerHexString(int i) => i.ToString("X2").ToLower();
-        var brush = (SolidColorBrush)value;
         string hex = lowerHexString(brush.Color.R) +
                   lowerHexString(brush.Color.G) +
                   lowerHexString(brush.Color.B);