diff --git a/src/balancing/ArenaView.cpp b/src/balancing/ArenaView.cpp
index dd06d4b..673b34e 100644
--- a/src/balancing/ArenaView.cpp
+++ b/src/balancing/ArenaView.cpp
@@ -451,7 +451,9 @@ void ArenaView::drawDebugSensorRanges(QPainter& painter)
             const QPointF center   = worldToWidget(pos.value);
             const qreal   radiusPx = static_cast<qreal>(sensor.value_tiles)
                                      * static_cast<qreal>(tilePx());
-            painter.setPen(QPen(it->second.outline, 1));
+            QColor circleColor = it->second.outline;
+            circleColor.setAlpha(77);
+            painter.setPen(QPen(circleColor, 1));
             painter.drawEllipse(center, radiusPx, radiusPx);
         });
 }
diff --git a/src/ui/GameWorldView.cpp b/src/ui/GameWorldView.cpp
index d9c1d33..437c041 100644
--- a/src/ui/GameWorldView.cpp
+++ b/src/ui/GameWorldView.cpp
@@ -918,7 +918,9 @@ void GameWorldView::drawDebugSensorRanges(QPainter& painter)
             const QPointF center   = worldToWidget(pos.value);
             const qreal   radiusPx = static_cast<qreal>(sensor.value_tiles)
                                      * static_cast<qreal>(tilePx());
-            painter.setPen(QPen(it->second.outline, 1));
+            QColor circleColor = it->second.outline;
+            circleColor.setAlpha(77);
+            painter.setPen(QPen(circleColor, 1));
             painter.drawEllipse(center, radiusPx, radiusPx);
         });
 }