diff --git a/src/plot.cpp b/src/plot.cpp
--- a/src/plot.cpp
+++ b/src/plot.cpp
@@ -154,6 +154,7 @@ void Plot::darkBackground(bool enabled)
         zoomer.setRubberBandPen(QPen(Qt::white));
         zoomer.setTrackerPen(QPen(Qt::white));
         sZoomer.setPickerPen(QPen(Qt::white));
+        legend.setTextPen(QPen(Qt::white));
     }
     else
     {
@@ -163,6 +164,7 @@ void Plot::darkBackground(bool enabled)
         zoomer.setRubberBandPen(QPen(Qt::black));
         zoomer.setTrackerPen(QPen(Qt::black));
         sZoomer.setPickerPen(QPen(Qt::black));
+        legend.setTextPen(QPen(Qt::black));
     }
     replot();
 }