--- a/QTfrontend/ui/widget/colorwidget.cpp	Sun Jun 16 00:49:58 2019 +0200
+++ b/QTfrontend/ui/widget/colorwidget.cpp	Sun Jun 16 12:19:43 2019 +0200
@@ -67,6 +67,7 @@
 
 void ColorWidget::wheelEvent(QWheelEvent *event)
 {
+    event->accept();
     if(event->delta() > 0)
         previousColor();
     else