diff --git a/tutorial/Gui23/main.cpp b/tutorial/Gui23/main.cpp
index e51330618..e924eac4a 100644
--- a/tutorial/Gui23/main.cpp
+++ b/tutorial/Gui23/main.cpp
@@ -23,7 +23,7 @@ struct RandomRectCtrl : public Ctrl {
 		int y = Random() % (sz.cy - length);
 		
 		rect = Rect(x, y, x + length, y + length);
-		color = Color(Random() % 255, Random() % 255, Random() % 255);
+		color = Color(Random() % 256, Random() % 256, Random() % 256);
 	}
 };
 
diff --git a/uppsrc/CtrlLib/srcdoc.tpp/Tutorial_en-us.tpp b/uppsrc/CtrlLib/srcdoc.tpp/Tutorial_en-us.tpp
index 050256492..32ec87a78 100644
--- a/uppsrc/CtrlLib/srcdoc.tpp/Tutorial_en-us.tpp
+++ b/uppsrc/CtrlLib/srcdoc.tpp/Tutorial_en-us.tpp
@@ -1800,8 +1800,8 @@ Ctrl `{]&]
 [s0;l320;%- [C         rect ][C@(0.0.255) `=][C  Rect(x, y, x ][C@(0.0.255) `+][C  
 length, y ][C@(0.0.255) `+][C  length);]&]
 [s0;l320;%- [C         color ][C@(0.0.255) `=][C  Color(Random() ][C@(0.0.255) %][C  
-][C@3 255][C , Random() ][C@(0.0.255) %][C  ][C@3 255][C , Random() ][C@(0.0.255) %][C  
-][C@3 255][C );]&]
+][C@3 256][C , Random() ][C@(0.0.255) %][C  ][C@3 256][C , Random() ][C@(0.0.255) %][C  
+][C@3 256][C );]&]
 [s0;l320;%- [C     `}]&]
 [s0;l320;%- [C `};]&]
 [s0;l320;C%- &]