diff -r 05f1935175da -r caff1a3a7456 QTfrontend/ui/page/pageoptions.cpp
--- a/QTfrontend/ui/page/pageoptions.cpp	Thu Apr 13 23:50:00 2017 +0200
+++ b/QTfrontend/ui/page/pageoptions.cpp	Fri Apr 14 06:36:36 2017 +0200
@@ -426,7 +426,7 @@
         }
 
         { // group: colors
-            OptionGroupBox * groupColors = new OptionGroupBox(":/res/lightbulb_on.png", tr("Custom colors"), this);
+            OptionGroupBox * groupColors = new OptionGroupBox(":/res/Palette.png", tr("Custom colors"), this);
             rightColumn->addWidget(groupColors);
 
             groupColors->layout()->setColumnStretch(0, 1);