diff --git a/clients/tde/src/widgets/tracewidget.cpp b/clients/tde/src/widgets/tracewidget.cpp
index 9edab59..8ceba00 100644
--- a/clients/tde/src/widgets/tracewidget.cpp
+++ b/clients/tde/src/widgets/tracewidget.cpp
@@ -44,6 +44,7 @@
 
 #define CURSOR_DARKNESS_FACTOR 200
 #define ZOOM_SHADING_DARKNESS_FACTOR 200
+#define DIGITAL_SHADING_DARKNESS_FACTOR 400
 
 #define CURSOR_MOVE_CAPTURE_DISTANCE 0
 
@@ -548,6 +549,7 @@ TraceData::TraceData(TraceWidget* parent, TQWidget* labelParent) : TQObject(), p
 	horizontalUnits = i18n("Units");
 	verticalUnits = i18n("Units");
 	m_digitalTraceDrawing = false;
+	m_digitalShaderDarkness = DIGITAL_SHADING_DARKNESS_FACTOR;
 	m_suppressNameInCursorText = false;
 	enabled = false;
 
@@ -718,23 +720,23 @@ void TraceData::drawTrace(TQPainter* p, int graticule_width, int graticule_heigh
 				// Draw fill areas
 				if ((sampleArray[n] != 0) && (sampleArray[n+1] != 0)) {
 					p->save();
-					p->fillRect(x+1, y+1, x2-x, baseline-y, TQBrush(color.dark(400)));
+					p->fillRect(x+1, y+1, x2-x, baseline-y, TQBrush(color.dark(m_digitalShaderDarkness)));
 					p->restore();
 				}
 				else if ((sampleArray[n] != 0) && (sampleArray[n+1] == 0)) {
 					p->save();
 					// Fill sloping edges
-					p->setPen(color.dark(400));
+					p->setPen(color.dark(m_digitalShaderDarkness));
 					p->drawLine(x2-3, y+1, x2-1, y2-1);
 					p->drawLine(x2-2, y+1, x2, y2-1);
 					// Fill rectangle under trace
-					p->fillRect(x+2, y+1, (x2-1)-(x+1)-1, baseline-y, TQBrush(color.dark(400)));
+					p->fillRect(x+2, y+1, (x2-1)-(x+1)-1, baseline-y, TQBrush(color.dark(m_digitalShaderDarkness)));
 					p->restore();
 				}
 				else if ((sampleArray[n] == 0) && (sampleArray[n+1] != 0)) {
 					p->save();
 					// Fill sloping edges
-					p->setPen(color.dark(400));
+					p->setPen(color.dark(m_digitalShaderDarkness));
 					p->drawLine(x2+1, y+1, x2+3, y2-1);
 					p->drawLine(x2, y+1, x2+2, y2-1);
 					p->restore();
diff --git a/clients/tde/src/widgets/tracewidget.h b/clients/tde/src/widgets/tracewidget.h
index 281f002..389c7c0 100644
--- a/clients/tde/src/widgets/tracewidget.h
+++ b/clients/tde/src/widgets/tracewidget.h
@@ -123,6 +123,7 @@ class TraceData : public TQObject
 		TQString horizontalUnits;
 		TQString verticalUnits;
 		bool m_digitalTraceDrawing;
+		unsigned int m_digitalShaderDarkness;
 		bool m_suppressNameInCursorText;
 		TQLabel* paramLabel;
 		TQLabel* leftLabel;