diff --git a/ACadSharp.Tests/IO/WriterSingleObjectTests.cs b/ACadSharp.Tests/IO/WriterSingleObjectTests.cs
index 3eee8d2a..8943841b 100644
--- a/ACadSharp.Tests/IO/WriterSingleObjectTests.cs
+++ b/ACadSharp.Tests/IO/WriterSingleObjectTests.cs
@@ -36,6 +36,14 @@ public void DefaultLayer()
 				this.Document.Layers.Add(new Layer("default_layer"));
 			}
 
+			public void LayerTrueColor()
+			{
+				Layer layer = new Layer("Layer_true_color");
+				layer.Color = Color.FromTrueColor(1151726);
+
+				this.Document.Layers.Add(layer);
+			}
+
 			public void EntityColorByLayer()
 			{
 				Layer layer = new Layer("Test");
@@ -171,6 +179,7 @@ static WriterSingleObjectTests()
 			Data.Add(new(nameof(SingleCaseGenerator.EntityColorByLayer)));
 			Data.Add(new(nameof(SingleCaseGenerator.EntityColorTrueColor)));
 			Data.Add(new(nameof(SingleCaseGenerator.DefaultLayer)));
+			Data.Add(new(nameof(SingleCaseGenerator.LayerTrueColor)));
 			Data.Add(new(nameof(SingleCaseGenerator.SingleMText)));
 			Data.Add(new(nameof(SingleCaseGenerator.SingleMTextSpecialCharacter)));
 			Data.Add(new(nameof(SingleCaseGenerator.SingleMTextMultiline)));
diff --git a/ACadSharp/IO/DWG/DwgStreamReaders/DwgStreamReaderAC18.cs b/ACadSharp/IO/DWG/DwgStreamReaders/DwgStreamReaderAC18.cs
index e9e77a6d..ee7f1eb7 100644
--- a/ACadSharp/IO/DWG/DwgStreamReaders/DwgStreamReaderAC18.cs
+++ b/ACadSharp/IO/DWG/DwgStreamReaders/DwgStreamReaderAC18.cs
@@ -72,6 +72,7 @@ public override Color ReadEnColor(out Transparency transparency, out bool flag)
 			{
 				//color flags: first byte of the bitshort.
 				ushort flags = (ushort)((ushort)size & 0b1111111100000000);
+
 				//0x4000: has AcDbColor reference (0x8000 is also set in this case).
 				if ((flags & 0x4000) > 0)
 				{
@@ -83,6 +84,7 @@ public override Color ReadEnColor(out Transparency transparency, out bool flag)
 				else if ((flags & 0x8000) > 0)
 				{
 					//Next value is a BS containing the RGB value(last 24 bits).
+					//flags: 0b1100_0010_0000_0000_0000_0000_0000_0000
 					uint rgb = (uint)this.ReadBitLong();
 					color = Color.FromTrueColor(rgb & 0b00000000111111111111111111111111);
 				}
diff --git a/ACadSharp/IO/DWG/DwgStreamWriters/DwgStreamWriterAC18.cs b/ACadSharp/IO/DWG/DwgStreamWriters/DwgStreamWriterAC18.cs
index 4570e0b5..12a0cee0 100644
--- a/ACadSharp/IO/DWG/DwgStreamWriters/DwgStreamWriterAC18.cs
+++ b/ACadSharp/IO/DWG/DwgStreamWriters/DwgStreamWriterAC18.cs
@@ -20,9 +20,9 @@ public override void WriteCmColor(Color value)
 
 			if (value.IsTrueColor)
 			{
-				arr[0] = (byte)(value.R);
-				arr[1] = (byte)(value.G);
-				arr[2] = (byte)(value.B);
+				arr[0] = (byte)value.R;
+				arr[1] = (byte)value.G;
+				arr[2] = (byte)value.B;
 				arr[3] = 0b1100_0010;
 			}
 			else
@@ -55,7 +55,7 @@ public override void WriteEnColor(Color color, Transparency transparency)
 			//0x2000: color is followed by a transparency BL
 			if (!transparency.IsByLayer)
 			{
-				size = (ushort)(size | 0x2000);
+				size = (ushort)(size | 0b10000000000000);
 			}
 
 			//0x8000: complex color (rgb).
@@ -73,7 +73,8 @@ public override void WriteEnColor(Color color, Transparency transparency)
 
 			if (color.IsTrueColor)
 			{
-				base.WriteBitLong(color.TrueColor);
+				uint rgb = (uint)(0b1100_0010_0000_0000_0000_0000_0000_0000 | color.TrueColor);
+				base.WriteBitLong((int)rgb);
 			}
 
 			if (!transparency.IsByLayer)