diff --git a/BizHawk.Emulation/BizHawk.Emulation.csproj b/BizHawk.Emulation/BizHawk.Emulation.csproj
index b41c4e7ed3..efc5488022 100644
--- a/BizHawk.Emulation/BizHawk.Emulation.csproj
+++ b/BizHawk.Emulation/BizHawk.Emulation.csproj
@@ -117,12 +117,6 @@
     <Compile Include="Consoles\Intellivision\MemoryMap.cs" />
     <Compile Include="Consoles\Intellivision\PSG.cs" />
     <Compile Include="Consoles\Intellivision\STIC.cs" />
-    <Compile Include="Consoles\Nintendo\Gameboy\ColorChooserForm.cs">
-      <SubType>Form</SubType>
-    </Compile>
-    <Compile Include="Consoles\Nintendo\Gameboy\ColorChooserForm.Designer.cs">
-      <DependentUpon>ColorChooserForm.cs</DependentUpon>
-    </Compile>
     <Compile Include="Consoles\Nintendo\Gameboy\Gambatte.cs" />
     <Compile Include="Consoles\Nintendo\Gameboy\LibGambatte.cs" />
     <Compile Include="Consoles\Nintendo\NES\APU.cs" />
@@ -436,11 +430,6 @@
     <None Include="Consoles\Nintendo\NES\Docs\MapperCompatibilityList.url" />
     <None Include="Consoles\Nintendo\NES\Docs\nesasm.pdf" />
   </ItemGroup>
-  <ItemGroup>
-    <EmbeddedResource Include="Consoles\Nintendo\Gameboy\ColorChooserForm.resx">
-      <DependentUpon>ColorChooserForm.cs</DependentUpon>
-    </EmbeddedResource>
-  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent Condition=" '$(OS)' == 'Windows_NT' ">"$(SolutionDir)subwcrev.bat" "$(ProjectDir)"</PreBuildEvent>
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/Gambatte.cs b/BizHawk.Emulation/Consoles/Nintendo/Gameboy/Gambatte.cs
index 9160e5af2e..1f99a24019 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/Gambatte.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/Gameboy/Gambatte.cs
@@ -82,7 +82,14 @@ namespace BizHawk.Emulation.Consoles.GB
 			return CurrentButtons;
 		}
 
-
+		/// <summary>
+		/// true if the emulator is currently emulating CGB
+		/// </summary>
+		/// <returns></returns>
+		public bool IsCGBMode()
+		{
+			return (LibGambatte.gambatte_iscgb(GambatteState));
+		}
 
 		public void FrameAdvance(bool render)
 		{
@@ -461,38 +468,13 @@ namespace BizHawk.Emulation.Consoles.GB
 
 		#region palette
 
-		/// <summary>
-		/// palette colors to display in dmg mode
-		/// </summary>
-		int[] dmgcolors = { // these are gambatte's default colors
-			0x00ffffff, 0x00aaaaaa, 0x00555555, 0x00000000,
-			0x00ffffff, 0x00aaaaaa, 0x00555555, 0x00000000,
-			0x00ffffff, 0x00aaaaaa, 0x00555555, 0x00000000,
-						  };
-
-		/// <summary>
-		/// pops up a modal dialog which allows dmg palettes
-		/// </summary>
-		/// <param name="parent"></param>
-		public void EditDMGColors(System.Windows.Forms.IWin32Window parent)
-		{
-			int[] tempcolors = (int[])dmgcolors.Clone();
-
-			// fixme: everything gets all un-fun in msvs when folders don't match namespaces
-			if (BizHawk.Emulation.Consoles.Nintendo.Gameboy.ColorChooserForm.DoColorChooserFormDialog(tempcolors))
-			{
-				dmgcolors = tempcolors;
-				SendColorsToCore();
-			}
-		}
-
 		/// <summary>
 		/// update gambatte core's internal colors
 		/// </summary>
-		void SendColorsToCore()
+		public void ChangeDMGColors(int[] colors)
 		{
-			for (int i = 0; i < dmgcolors.Length; i++)
-				LibGambatte.gambatte_setdmgpalettecolor(GambatteState, (LibGambatte.PalType)(i / 4), (uint)i % 4, (uint)dmgcolors[i]);
+			for (int i = 0; i < 12; i++)
+				LibGambatte.gambatte_setdmgpalettecolor(GambatteState, (LibGambatte.PalType)(i / 4), (uint)i % 4, (uint)colors[i]);
 		}
 
 		#endregion
diff --git a/BizHawk.MultiClient/BizHawk.MultiClient.csproj b/BizHawk.MultiClient/BizHawk.MultiClient.csproj
index db0ac50454..9fea92f0b6 100644
--- a/BizHawk.MultiClient/BizHawk.MultiClient.csproj
+++ b/BizHawk.MultiClient/BizHawk.MultiClient.csproj
@@ -188,6 +188,12 @@
     </Compile>
     <Compile Include="DisplayManager\DisplayManager.cs" />
     <Compile Include="DisplayManager\Filters\Hq2x.cs" />
+    <Compile Include="GBtools\ColorChooserForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="GBtools\ColorChooserForm.designer.cs">
+      <DependentUpon>ColorChooserForm.cs</DependentUpon>
+    </Compile>
     <Compile Include="Global.cs" />
     <Compile Include="HawkFile.cs" />
     <Compile Include="Input\ControllerBinding.cs" />
@@ -382,6 +388,9 @@
     <EmbeddedResource Include="config\GifAnimator.resx">
       <DependentUpon>GifAnimator.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="GBtools\ColorChooserForm.resx">
+      <DependentUpon>ColorChooserForm.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="MainForm.resx">
       <DependentUpon>MainForm.cs</DependentUpon>
       <SubType>Designer</SubType>
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.Designer.cs b/BizHawk.MultiClient/GBtools/ColorChooserForm.Designer.cs
similarity index 96%
rename from BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.Designer.cs
rename to BizHawk.MultiClient/GBtools/ColorChooserForm.Designer.cs
index b064c6e538..24bf66cb70 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.Designer.cs
+++ b/BizHawk.MultiClient/GBtools/ColorChooserForm.Designer.cs
@@ -1,4 +1,4 @@
-namespace BizHawk.Emulation.Consoles.Nintendo.Gameboy
+namespace BizHawk.MultiClient.GBtools
 {
 	partial class ColorChooserForm
 	{
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.cs b/BizHawk.MultiClient/GBtools/ColorChooserForm.cs
similarity index 87%
rename from BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.cs
rename to BizHawk.MultiClient/GBtools/ColorChooserForm.cs
index 125cc0c14e..59b8f11fc6 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.cs
+++ b/BizHawk.MultiClient/GBtools/ColorChooserForm.cs
@@ -8,7 +8,7 @@ using System.Text;
 using System.Windows.Forms;
 using System.IO;
 
-namespace BizHawk.Emulation.Consoles.Nintendo.Gameboy
+namespace BizHawk.MultiClient.GBtools
 {
 	public partial class ColorChooserForm : Form
 	{
@@ -19,6 +19,17 @@ namespace BizHawk.Emulation.Consoles.Nintendo.Gameboy
 
 		Color[] colors = new Color[12];
 
+		/// <summary>
+		/// gambatte's default dmg colors
+		/// </summary>
+		static readonly int[] DefaultColors =
+		{
+			0x00ffffff, 0x00aaaaaa, 0x00555555, 0x00000000,
+			0x00ffffff, 0x00aaaaaa, 0x00555555, 0x00000000,
+			0x00ffffff, 0x00aaaaaa, 0x00555555, 0x00000000,
+		};
+
+
 		private void RefreshAllBackdrops()
 		{
 			panel1.BackColor = colors[0];
@@ -203,21 +214,25 @@ namespace BizHawk.Emulation.Consoles.Nintendo.Gameboy
 			RefreshAllBackdrops();
 		}
 
-		public static bool DoColorChooserFormDialog(int[] colors)
+		public static bool DoColorChooserFormDialog(Action<int[]> ColorUpdater, IWin32Window parent)
 		{
 			using (var dlg = new ColorChooserForm())
 			{
-				dlg.SetAllColors(colors);
+				//if (colors != null)
+				//	dlg.SetAllColors(colors);
+				dlg.SetAllColors(DefaultColors);
 
-				var result = dlg.ShowDialog();
+				var result = dlg.ShowDialog(parent);
 				if (result != DialogResult.OK)
 				{
 					return false;
 				}
 				else
 				{
-					for (int i = 0; i < dlg.colors.Length; i++)
-						colors[i] = dlg.colors[i].ToArgb();
+					int[] colorints = new int[12];
+					for (int i = 0; i < 12; i++)
+						colorints[i] = dlg.colors[i].ToArgb();
+					ColorUpdater(colorints);
 					return true;
 				}
 			}
diff --git a/BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.resx b/BizHawk.MultiClient/GBtools/ColorChooserForm.resx
similarity index 100%
rename from BizHawk.Emulation/Consoles/Nintendo/Gameboy/ColorChooserForm.resx
rename to BizHawk.MultiClient/GBtools/ColorChooserForm.resx
diff --git a/BizHawk.MultiClient/MainForm.MenuItems.cs b/BizHawk.MultiClient/MainForm.MenuItems.cs
index 815b4ea3f3..1d892c448c 100644
--- a/BizHawk.MultiClient/MainForm.MenuItems.cs
+++ b/BizHawk.MultiClient/MainForm.MenuItems.cs
@@ -1658,6 +1658,13 @@ namespace BizHawk.MultiClient
 
 		private void gBToolStripMenuItem_DropDownOpened(object sender, EventArgs e)
 		{
+			// the palettes have no effect when CGB mode is active
+			if (Global.Emulator is Emulation.Consoles.GB.Gameboy)
+			{
+				changeDMGPalettesToolStripMenuItem.Enabled =
+					!((Emulation.Consoles.GB.Gameboy)Global.Emulator).IsCGBMode();
+			}
+
 			//skipBIOSIntroToolStripMenuItem.Checked = Global.Config.GameBoySkipBIOS;
 			forceDMGModeToolStripMenuItem.Checked = Global.Config.GB_ForceDMG;
 			gBAInCGBModeToolStripMenuItem.Checked = Global.Config.GB_GBACGB;
diff --git a/BizHawk.MultiClient/MainForm.cs b/BizHawk.MultiClient/MainForm.cs
index a6f36ae408..01be8237cd 100644
--- a/BizHawk.MultiClient/MainForm.cs
+++ b/BizHawk.MultiClient/MainForm.cs
@@ -3529,7 +3529,7 @@ namespace BizHawk.MultiClient
 		{
 			if (Global.Emulator is Gameboy)
 			{
-				((Gameboy)Global.Emulator).EditDMGColors(this);
+				GBtools.ColorChooserForm.DoColorChooserFormDialog(((Gameboy)Global.Emulator).ChangeDMGColors, this);
 			}
 		}