diff --git a/BizHawk.Emulation.Cores/Consoles/WonderSwan/BizSwan.cs b/BizHawk.Emulation.Cores/Consoles/WonderSwan/BizSwan.cs
index 9aa024bf21..95c8f01167 100644
--- a/BizHawk.Emulation.Cores/Consoles/WonderSwan/BizSwan.cs
+++ b/BizHawk.Emulation.Cores/Consoles/WonderSwan/BizSwan.cs
@@ -252,6 +252,16 @@ namespace BizHawk.Emulation.Cores.WonderSwan
 		public struct Settings
 		{
 			public LayerFlags LayerMask; // 1 = show
+			/// <summary>
+			/// map bw shades to output colors, [0] = darkest, [15] = lightest
+			/// </summary>
+			[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+			public uint[] BWPalette;
+			/// <summary>
+			/// map color shades to output colors, bits 0-3 blue, bits 4-7 green, bits 8-11 red
+			/// </summary>
+			[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4096)]
+			public uint[] ColorPalette;
 		}
 	}
 }
diff --git a/BizHawk.Emulation.Cores/Consoles/WonderSwan/WonderSwan.ISettable.cs b/BizHawk.Emulation.Cores/Consoles/WonderSwan/WonderSwan.ISettable.cs
index c3bc8d0752..024db5612c 100644
--- a/BizHawk.Emulation.Cores/Consoles/WonderSwan/WonderSwan.ISettable.cs
+++ b/BizHawk.Emulation.Cores/Consoles/WonderSwan/WonderSwan.ISettable.cs
@@ -5,6 +5,7 @@ using System.Text;
 using BizHawk.Emulation.Common;
 using System.ComponentModel;
 using BizHawk.Common;
+using System.Drawing;
 
 namespace BizHawk.Emulation.Cores.WonderSwan
 {
@@ -30,23 +31,58 @@ namespace BizHawk.Emulation.Cores.WonderSwan
 			[DefaultValue(true)]
 			public bool EnableSprites { get; set; }
 
+			[DisplayName("B&W Palette")]
+			[Description("Colors to display in Wonderswan (not Color) mode")]
+			public Color[] BWPalette { get; private set; }
+
 			public BizSwan.Settings GetNativeSettings()
 			{
 				var ret = new BizSwan.Settings();
 				if (EnableBG) ret.LayerMask |= BizSwan.LayerFlags.BG;
 				if (EnableFG) ret.LayerMask |= BizSwan.LayerFlags.FG;
 				if (EnableSprites) ret.LayerMask |= BizSwan.LayerFlags.Sprite;
+
+				ret.BWPalette = new uint[16];
+				for (int i = 0; i < 16; i++)
+					ret.BWPalette[i] = (uint)BWPalette[i].ToArgb() | 0xff000000;
+
+				// default color algorithm from wonderswan
+				// todo: we could give options like the gameboy cores have
+				ret.ColorPalette = new uint[4096];
+				for (int r = 0; r < 16; r++)
+				{
+					for (int g = 0; g < 16; g++)
+					{
+						for (int b = 0; b < 16; b++)
+						{
+							uint neo_r, neo_g, neo_b;
+
+							neo_r = (uint)r * 17;
+							neo_g = (uint)g * 17;
+							neo_b = (uint)b * 17;
+							ret.ColorPalette[r << 8 | g << 4 | b] = 0xff000000 | neo_r << 16 | neo_g << 8 | neo_b << 0;
+						}
+					}
+				}
+
 				return ret;
 			}
 
 			public Settings()
 			{
 				SettingsUtil.SetDefaultValues(this);
+				BWPalette = new Color[16];
+				for (int i = 0; i < 16; i++)
+				{
+					BWPalette[i] = Color.FromArgb(255, i * 17, i * 17, i * 17);
+				}
 			}
 
 			public Settings Clone()
 			{
-				return (Settings)MemberwiseClone();
+				var ret = (Settings)MemberwiseClone();
+				ret.BWPalette = (Color[])BWPalette.Clone();
+				return ret;
 			}
 		}
 
diff --git a/output/dll/bizswan.dll b/output/dll/bizswan.dll
index 7c6b69620b..ab5717249e 100644
Binary files a/output/dll/bizswan.dll and b/output/dll/bizswan.dll differ
diff --git a/output64/dll/bizswan.dll b/output64/dll/bizswan.dll
index 7e3a0341d6..7c0542124a 100644
Binary files a/output64/dll/bizswan.dll and b/output64/dll/bizswan.dll differ
diff --git a/wonderswan/gfx.cpp b/wonderswan/gfx.cpp
index ac51c557d9..baaaafce1d 100644
--- a/wonderswan/gfx.cpp
+++ b/wonderswan/gfx.cpp
@@ -26,7 +26,7 @@ namespace MDFN_IEN_WSWAN
 	GFX::GFX()
 		:LayerEnabled(7) // 1 = bg, 2 = fg, 4 = sprite
 	{
-		SetPixelFormat();
+		//SetPixelFormat();
 	}
 
 
@@ -239,6 +239,16 @@ namespace MDFN_IEN_WSWAN
 		LayerEnabled = mask;
 	}
 
+	void GFX::SetBWPalette(const uint32 *colors)
+	{
+		std::memcpy(ColorMapG, colors, sizeof(ColorMapG));
+	}
+	void GFX::SetColorPalette(const uint32 *colors)
+	{
+		std::memcpy(ColorMap, colors, sizeof(ColorMap));
+	}
+
+	/*
 	void GFX::SetPixelFormat()
 	{
 		for(int r = 0; r < 16; r++)
@@ -268,7 +278,7 @@ namespace MDFN_IEN_WSWAN
 				}
 			}
 		}
-	}
+	}*/
 
 	void GFX::Scanline(uint32 *target)
 	{
@@ -626,10 +636,11 @@ namespace MDFN_IEN_WSWAN
 		NSS(wsColors);
 		NSS(wsCols);
 
-		NSS(ColorMapG);
-		NSS(ColorMap);
-		NSS(LayerEnabled);
-
+		/* non-sync settings related to output
+		NSS(ColorMapG); // b&w color output
+		NSS(ColorMap); // color color output
+		NSS(LayerEnabled); // layer enable mask
+		*/
 		NSS(wsLine);
 
 		NSS(SpriteTable);
diff --git a/wonderswan/gfx.h b/wonderswan/gfx.h
index 0fbef1e471..b1f7bafb32 100644
--- a/wonderswan/gfx.h
+++ b/wonderswan/gfx.h
@@ -29,6 +29,8 @@ public:
 	bool ExecuteLine(uint32 *surface, bool skip);
 
 	void SetLayerEnableMask(uint32 mask);
+	void SetBWPalette(const uint32 *colors);
+	void SetColorPalette(const uint32 *colors);
 
 private:
 	// TCACHE ====================================
diff --git a/wonderswan/system.cpp b/wonderswan/system.cpp
index 3a61d3992b..28928d0a29 100644
--- a/wonderswan/system.cpp
+++ b/wonderswan/system.cpp
@@ -268,6 +268,8 @@ namespace MDFN_IEN_WSWAN
 	void System::PutSettings(const Settings &s)
 	{
 		gfx.SetLayerEnableMask(s.LayerMask);
+		gfx.SetBWPalette(s.BWPalette);
+		gfx.SetColorPalette(s.ColorPalette);
 	}
 
 	uint32 System::GetNECReg(int which) const
diff --git a/wonderswan/system.h b/wonderswan/system.h
index 51dff3972e..2ab37ae0ce 100644
--- a/wonderswan/system.h
+++ b/wonderswan/system.h
@@ -77,6 +77,8 @@ struct SyncSettings
 struct Settings
 {
 	uint32 LayerMask; // 1 = enable bg, 2 = enable fg, 4 = enable sprites
+	uint32 BWPalette[16]; // map 16 b&w shades to output colors
+	uint32 ColorPalette[4096]; // map 4096 color shades to output colors
 };
 
 namespace Debug