Index: sources/gui/qml/pages/pretreatment/PreTreatmentPrimeStack.qml
===================================================================
diff -u -ra6586ea871f21a08e7d50552983360fb5e344b3a -rb2a142c4dc20ee139294a6a7b0b07ae5df8c553e
--- sources/gui/qml/pages/pretreatment/PreTreatmentPrimeStack.qml	(.../PreTreatmentPrimeStack.qml)	(revision a6586ea871f21a08e7d50552983360fb5e344b3a)
+++ sources/gui/qml/pages/pretreatment/PreTreatmentPrimeStack.qml	(.../PreTreatmentPrimeStack.qml)	(revision b2a142c4dc20ee139294a6a7b0b07ae5df8c553e)
@@ -76,6 +76,7 @@
                     width       : parent.spacing
                     text.text   : qsTr("Start  Prime")
                     onClicked   : _root.startPrimeClicked()
+                    bgColor     : Colors.backgroundButtonSelect
                 }
                 // , // commented out in demo feedback kept if needed to have any other screen later
                 // Text { id: _recirculateText