diff --git a/rtgui/colorappearance.cc b/rtgui/colorappearance.cc
index c9fb1baa3..f8dee05df 100644
--- a/rtgui/colorappearance.cc
+++ b/rtgui/colorappearance.cc
@@ -1536,7 +1536,7 @@ void ColorAppearance::colorForValue (double valX, double valY, enum ColorCaller:
         float value = (1.f - 0.7f) * float (valX) + 0.7f;
         // whole hue range
         // Y axis / from 0.15 up to 0.75 (arbitrary values; was 0.45 before)
-        Color::hsv2rgb01 (float (valY), float (valX), value, R, G, B);
+        Color::hsv2rgb01 (float (valY*0.8), float (valX), value, R, G, B);
     }
 
     caller->ccRed = double (R);
diff --git a/rtgui/colortoning.cc b/rtgui/colortoning.cc
index b53f7e5db..180b4235a 100644
--- a/rtgui/colortoning.cc
+++ b/rtgui/colortoning.cc
@@ -41,7 +41,7 @@ ColorToning::ColorToning () : FoldableToolPanel(this, "colortoning", M("TP_COLOR
     colorCurveEditorG->setCurveListener (this);
 
     colorShape = static_cast<FlatCurveEditor*>(colorCurveEditorG->addCurve(CT_Flat, "", nullptr, false, false));
-    colorShape->setCurveColorProvider(this, 1);
+    colorShape->setCurveColorProvider(this, 4);
     std::vector<GradientMilestone> milestones;
 
     // whole hue range
@@ -951,8 +951,8 @@ void ColorToning::colorForValue (double valX, double valY, enum ColorCaller::Ele
 
     float R = 0.f, G = 0.f, B = 0.f;
 
-    if (callerId == 1) {         // ch - main curve
-        Color::hsv2rgb01(float(valY), 1.0f, 0.5f, R, G, B);
+    if (callerId == 1) {         // opacity curve left bar(s)
+        Color::hsv2rgb01(float(valY*0.8), 1.0f, 0.5f, R, G, B);
     } else if (callerId == 2) {  // Slider 1 background
         if (valY <= 0.5)
             // the hue range
@@ -983,6 +983,8 @@ void ColorToning::colorForValue (double valX, double valY, enum ColorCaller::Ele
             G = (gray * (1.0 - valX)) + G * valX;
             B = (gray * (1.0 - valX)) + B * valX;
         }
+    } else if (callerId == 4) {  // color curve vertical and horizontal crosshair
+        Color::hsv2rgb01(float(valY), 1.0f, 0.5f, R, G, B);
     }
 
     caller->ccRed = double(R);