diff --git a/Terminal.Gui/Drawing/Color/Color.cs b/Terminal.Gui/Drawing/Color/Color.cs
index f220de1ab..995249c13 100644
--- a/Terminal.Gui/Drawing/Color/Color.cs
+++ b/Terminal.Gui/Drawing/Color/Color.cs
@@ -113,7 +113,7 @@ public readonly partial record struct Color : ISpanParsable<Color>, IUtf8SpanPar
 
     /// <summary>Initializes a new instance of the <see cref="Color"/> color from a value in the <see cref="StandardColor"/> enum.</summary>
     /// <param name="colorName">The 16-color value.</param>
-    public Color (in StandardColor colorName) : this ((int)colorName) { }
+    public Color (in StandardColor colorName) : this (StandardColors.GetArgb (colorName)) { }
 
     /// <summary>
     ///     Initializes a new instance of the <see cref="Color"/> color from string. See
diff --git a/Tests/UnitTestsParallelizable/Drawing/Color/ColorStandardColorTests.cs b/Tests/UnitTestsParallelizable/Drawing/Color/ColorStandardColorTests.cs
new file mode 100644
index 000000000..eaf107010
--- /dev/null
+++ b/Tests/UnitTestsParallelizable/Drawing/Color/ColorStandardColorTests.cs
@@ -0,0 +1,27 @@
+using Xunit;
+
+namespace Terminal.Gui.DrawingTests;
+
+public class ColorStandardColorTests
+{
+    [Fact]
+    public void ToString_Returns_Standard_Name_For_StandardColor_CadetBlue()
+    {
+        // Without the fix, this uses Color(in StandardColor) -> this((int)colorName),
+        // which sets A=0x00 and prevents name resolution (expects A=0xFF).
+        var c = new Terminal.Gui.Drawing.Color(Terminal.Gui.Drawing.StandardColor.CadetBlue);
+
+        // Expected: named color
+        Assert.Equal("CadetBlue", c.ToString());
+    }
+
+    [Fact]
+    public void ToString_G_Prints_Opaque_ARGB_For_StandardColor_CadetBlue()
+    {
+        // Without the fix, A=0x00, so "G" prints "#005F9EA0" instead of "#FF5F9EA0".
+        var c = new Terminal.Gui.Drawing.Color(Terminal.Gui.Drawing.StandardColor.CadetBlue);
+
+        // Expected: #AARRGGBB with A=FF (opaque)
+        Assert.Equal("#FF5F9EA0", c.ToString("G", null));
+    }
+}
\ No newline at end of file