diff --git a/profile-widget/divecartesianaxis.cpp b/profile-widget/divecartesianaxis.cpp
index 78ff7fcee..acbd6d1bc 100644
--- a/profile-widget/divecartesianaxis.cpp
+++ b/profile-widget/divecartesianaxis.cpp
@@ -11,18 +11,6 @@
 static const double labelSpaceHorizontal = 2.0; // space between label and ticks
 static const double labelSpaceVertical = 2.0; // space between label and ticks
 
-QPen DiveCartesianAxis::gridPen() const
-{
-	QPen pen;
-	pen.setColor(getColor(TIME_GRID));
-	/* cosmetic width() == 0 for lines in printMode
-	 * having setCosmetic(true) and width() > 0 does not work when
-	 * printing on OSX and Linux */
-	pen.setWidth(DiveCartesianAxis::printMode ? 0 : 2);
-	pen.setCosmetic(true);
-	return pen;
-}
-
 void DiveCartesianAxis::setFontLabelScale(qreal scale)
 {
 	labelScale = scale;
@@ -45,7 +33,8 @@ void DiveCartesianAxis::setMinimum(double minimum)
 	changed = true;
 }
 
-DiveCartesianAxis::DiveCartesianAxis(Position position, color_index_t gridColor, double dpr, bool printMode, ProfileScene &scene) :
+DiveCartesianAxis::DiveCartesianAxis(Position position, color_index_t gridColor, double dpr,
+				     bool printMode, bool isGrayscale, ProfileScene &scene) :
 	printMode(printMode),
 	position(position),
 	gridColor(gridColor),
@@ -60,7 +49,17 @@ DiveCartesianAxis::DiveCartesianAxis(Position position, color_index_t gridColor,
 	changed(true),
 	dpr(dpr)
 {
-	setPen(gridPen());
+	QPen pen;
+	pen.setColor(getColor(TIME_GRID, isGrayscale));
+	/* cosmetic width() == 0 for lines in printMode
+	 * having setCosmetic(true) and width() > 0 does not work when
+	 * printing on OSX and Linux */
+	pen.setWidth(DiveCartesianAxis::printMode ? 0 : 2);
+	pen.setCosmetic(true);
+	setPen(pen);
+
+	pen.setBrush(getColor(gridColor, isGrayscale));
+	gridPen = pen;
 }
 
 DiveCartesianAxis::~DiveCartesianAxis()
@@ -241,9 +240,7 @@ void DiveCartesianAxis::updateTicks(int animSpeed)
 			childPos = begin - i * stepSize;
 		}
 		DiveLineItem *line = new DiveLineItem(this);
-		QPen pen = gridPen();
-		pen.setBrush(getColor(gridColor));
-		line->setPen(pen);
+		line->setPen(gridPen);
 		line->setZValue(0);
 		lines.push_back(line);
 		if (position == Position::Bottom) {
@@ -372,8 +369,9 @@ QColor DepthAxis::colorForValue(double) const
 	return QColor(Qt::red);
 }
 
-DepthAxis::DepthAxis(Position position, color_index_t gridColor, double dpr, bool printMode, ProfileScene &scene) :
-	DiveCartesianAxis(position, gridColor, dpr, printMode, scene)
+DepthAxis::DepthAxis(Position position, color_index_t gridColor, double dpr,
+		     bool printMode, bool isGrayscale, ProfileScene &scene) :
+	DiveCartesianAxis(position, gridColor, dpr, printMode, isGrayscale, scene)
 {
 	changed = true;
 }
@@ -408,8 +406,8 @@ QString TemperatureAxis::textForValue(double value) const
 }
 
 PartialGasPressureAxis::PartialGasPressureAxis(const DivePlotDataModel &model, Position position, color_index_t gridColor,
-					       double dpr, bool printMode, ProfileScene &scene) :
-	DiveCartesianAxis(position, gridColor, dpr, printMode, scene),
+					       double dpr, bool printMode, bool isGrayscale, ProfileScene &scene) :
+	DiveCartesianAxis(position, gridColor, dpr, printMode, isGrayscale, scene),
 	model(model)
 {
 }
diff --git a/profile-widget/divecartesianaxis.h b/profile-widget/divecartesianaxis.h
index 604a98e47..9837014e9 100644
--- a/profile-widget/divecartesianaxis.h
+++ b/profile-widget/divecartesianaxis.h
@@ -4,6 +4,7 @@
 
 #include <QObject>
 #include <QGraphicsLineItem>
+#include <QPen>
 #include "core/color.h"
 #include "core/units.h"
 
@@ -21,7 +22,6 @@ class DiveCartesianAxis : public QObject, public QGraphicsLineItem {
 	Q_PROPERTY(qreal y WRITE setY READ y)
 private:
 	bool printMode;
-	QPen gridPen() const;
 public:
 	enum Orientation {
 		TopToBottom,
@@ -32,7 +32,8 @@ public:
 	enum class Position {
 		Left, Right, Bottom
 	};
-	DiveCartesianAxis(Position position, color_index_t gridColor, double dpr, bool printMode, ProfileScene &scene);
+	DiveCartesianAxis(Position position, color_index_t gridColor, double dpr,
+			  bool printMode, bool isGrayscale, ProfileScene &scene);
 	~DiveCartesianAxis();
 	void setMinimum(double minimum);
 	void setMaximum(double maximum);
@@ -58,6 +59,7 @@ signals:
 protected:
 	Position position;
 	QRectF rect; // Rectangle to fill with grid lines
+	QPen gridPen;
 	color_index_t gridColor;
 	ProfileScene &scene;
 	virtual QString textForValue(double value) const;
@@ -79,7 +81,8 @@ protected:
 class DepthAxis : public DiveCartesianAxis {
 	Q_OBJECT
 public:
-	DepthAxis(Position position, color_index_t gridColor, double dpr, bool printMode, ProfileScene &scene);
+	DepthAxis(Position position, color_index_t gridColor, double dpr,
+		  bool printMode, bool isGrayscale, ProfileScene &scene);
 private:
 	QString textForValue(double value) const override;
 	QColor colorForValue(double value) const override;
@@ -107,7 +110,7 @@ class PartialGasPressureAxis : public DiveCartesianAxis {
 	Q_OBJECT
 public:
 	PartialGasPressureAxis(const DivePlotDataModel &model, Position position, color_index_t gridColor,
-			       double dpr, bool printMode, ProfileScene &scene);
+			       double dpr, bool printMode, bool isGrayscale, ProfileScene &scene);
 	void update(int animSpeed);
 	double width() const;
 private:
diff --git a/profile-widget/profilescene.cpp b/profile-widget/profilescene.cpp
index 186015378..1cabab5cc 100644
--- a/profile-widget/profilescene.cpp
+++ b/profile-widget/profilescene.cpp
@@ -47,13 +47,13 @@ ProfileScene::ProfileScene(double dpr, bool printMode, bool isGrayscale) :
 	maxtime(-1),
 	maxdepth(-1),
 	dataModel(new DivePlotDataModel(this)),
-	profileYAxis(new DepthAxis(DiveCartesianAxis::Position::Left, TIME_GRID, dpr, printMode, *this)),
-	gasYAxis(new PartialGasPressureAxis(*dataModel, DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, *this)),
-	temperatureAxis(new TemperatureAxis(DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, *this)),
-	timeAxis(new TimeAxis(DiveCartesianAxis::Position::Bottom, TIME_GRID, dpr, printMode, *this)),
-	cylinderPressureAxis(new DiveCartesianAxis(DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, *this)),
-	heartBeatAxis(new DiveCartesianAxis(DiveCartesianAxis::Position::Left, HR_AXIS, dpr, printMode, *this)),
-	percentageAxis(new DiveCartesianAxis(DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, *this)),
+	profileYAxis(new DepthAxis(DiveCartesianAxis::Position::Left, TIME_GRID, dpr, printMode, isGrayscale, *this)),
+	gasYAxis(new PartialGasPressureAxis(*dataModel, DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, isGrayscale, *this)),
+	temperatureAxis(new TemperatureAxis(DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, isGrayscale, *this)),
+	timeAxis(new TimeAxis(DiveCartesianAxis::Position::Bottom, TIME_GRID, dpr, printMode, isGrayscale, *this)),
+	cylinderPressureAxis(new DiveCartesianAxis(DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, isGrayscale, *this)),
+	heartBeatAxis(new DiveCartesianAxis(DiveCartesianAxis::Position::Left, HR_AXIS, dpr, printMode, isGrayscale, *this)),
+	percentageAxis(new DiveCartesianAxis(DiveCartesianAxis::Position::Right, TIME_GRID, dpr, printMode, isGrayscale, *this)),
 	diveProfileItem(createItem<DiveProfileItem>(*profileYAxis, DivePlotDataModel::DEPTH, 0, dpr)),
 	temperatureItem(createItem<DiveTemperatureItem>(*temperatureAxis, DivePlotDataModel::TEMPERATURE, 1, dpr)),
 	meanDepthItem(createItem<DiveMeanDepthItem>(*profileYAxis, DivePlotDataModel::INSTANT_MEANDEPTH, 1, dpr)),