Index: sources/gui/qml/components/SliderCreateTreatment.qml
===================================================================
diff -u -rc71deaab48699cffdf9db816dfac2778d79c2238 -r2d09ae36f6b791e0415a87b6f14f582d4b434d7d
--- sources/gui/qml/components/SliderCreateTreatment.qml	(.../SliderCreateTreatment.qml)	(revision c71deaab48699cffdf9db816dfac2778d79c2238)
+++ sources/gui/qml/components/SliderCreateTreatment.qml	(.../SliderCreateTreatment.qml)	(revision 2d09ae36f6b791e0415a87b6f14f582d4b434d7d)
@@ -41,6 +41,16 @@
     anchors.horizontalCenter: parent.horizontalCenter
     color: "transparent";
 
+    function setValid(valid) {
+        if (valid) {
+            _selected_value.color = Colors.textMain
+            _text.color = Colors.textMain
+        } else {
+            _selected_value.color = Colors.createTrInvalidParam
+            _text.color = Colors.createTrInvalidParam
+        }
+    }
+
     Text {
         id: _text
         text: ""
@@ -78,17 +88,21 @@
             _selected_value.text = value + _root.units
             sliderChanged()
         }
+
         onActiveChanged: {
             if (isActive) {
                 _selected_value.color = Colors.textMain
+                _text.color = Colors.textMain
             } else {
                 _selected_value.color = Colors.textDisableButton
+                _text.color = Colors.textDisableButton
             }
         }
 
-        onProgressRectClicked: setActive(true)
-        onProgressRectDragged: setActive(true)
-        onDragged: setActive(true)
-        onClicked: setActive(true)
+        onProgressRectClicked: { setActive(true); setValid(true); }
+        onProgressRectDragged: { setActive(true); setValid(true); }
+        onDragged: { setActive(true); setValid(true); }
+        onClicked: { setActive(true); setValid(true); }
+
     }
 }