diff --git a/components/lazutils/graphtype.pp b/components/lazutils/graphtype.pp
index 98a091515c..f44d513a06 100644
--- a/components/lazutils/graphtype.pp
+++ b/components/lazutils/graphtype.pp
@@ -22,8 +22,15 @@ unit GraphType;
 
 interface
 
+{$if FPC_FULLVERSION>=30203}
+{$define UseSystemUITypes}
+{$endif}
+
 uses
   Classes, SysUtils, Types, Math,
+  {$ifdef UseSystemUITypes}
+  System.UITypes,
+  {$endif}
   // LazUtils
   FPCAdds, LazLoggerBase;
 
@@ -32,7 +39,7 @@ uses
 {$endif}
 
 type
-  TGraphicsColor = -$7FFFFFFF-1..$7FFFFFFF;
+  TGraphicsColor = {$ifdef UseSystemUITypes}System.UITypes.TColor{$else}-$7FFFFFFF-1..$7FFFFFFF{$endif};
   TGraphicsFillStyle =
   (
     fsSurface, // fill till the color (it fills all except this color)
diff --git a/lcl/graphics.pp b/lcl/graphics.pp
index d9c1f26513..fcc09464ad 100644
--- a/lcl/graphics.pp
+++ b/lcl/graphics.pp
@@ -37,6 +37,10 @@ interface
 {$DEFINE HasFPJoinStyle}
 {$ENDIF}
 
+{$IF FPC_FULLVERSION>=30203}
+{$DEFINE UseSystemUITypes}
+{$ENDIF}
+
 uses
   // RTL + FCL
   SysUtils, Math, Types, Classes, Contnrs, Laz_AVL_Tree,
@@ -55,6 +59,9 @@ uses
   {$IFNDEF DisableLCLGIF}
   FPReadGif,
   {$ENDIF}
+  {$IFDEF UseSystemUITypes}
+  System.UITypes,
+  {$ENDIF}
   // LCL
   LCLVersion, LCLStrConsts, LCLType, LCLProc, LMessages, LResources, LCLResCache,
   IntfGraphics, IcnsTypes, WSReferences,
@@ -62,7 +69,7 @@ uses
   GraphType, GraphMath, FPCAdds, LazLoggerBase, LazTracer, LazUtilities;
 
 type
-  PColor = ^TColor;
+  PColor = {$IFDEF UseSystemUITypes}System.UITypes.PColor{$ELSE}^TColor{$ENDIF};
   TColor = TGraphicsColor;
 
   TFontPitch = (fpDefault, fpVariable, fpFixed);
diff --git a/lcl/lcltype.pp b/lcl/lcltype.pp
index 1103b4b86b..2d2ce4155c 100644
--- a/lcl/lcltype.pp
+++ b/lcl/lcltype.pp
@@ -39,6 +39,10 @@ interface
   {$ASSERTIONS ON}
 {$endif}
 
+{$if FPC_FULLVERSION >= 30203}
+{$define UseSystemUITypes}
+{$endif}
+
 uses
 {$IFDEF USE_UTF8BIDI_LCL}
   UTF8BIDI,
@@ -46,6 +50,9 @@ uses
 {$ifdef WINDOWS}
   windows,
 {$endif WINDOWS}
+{$ifdef UseSystemUITypes}
+  System.UITypes,
+{$endif}
   Classes, SysUtils;
 
 {$ifdef WinCE}
@@ -1657,7 +1664,7 @@ const
 //==============================================
 
 type
-  COLORREF = Cardinal;
+  COLORREF = {$ifdef UseSystemUITypes}System.UITypes.TColorRef{$else}Cardinal{$endif};
   TColorRef = COLORREF;
 
 const