diff --git a/resources/qml/Sidebar.qml b/resources/qml/Sidebar.qml
index e803406369..3b641a4538 100644
--- a/resources/qml/Sidebar.qml
+++ b/resources/qml/Sidebar.qml
@@ -17,6 +17,8 @@ UM.AngledCornerRectangle {
 
     cornerSize: UM.Theme.sizes.default_margin.width;
 
+    color: UM.Theme.colors.sidebar;
+
     function showTooltip(item, position, text) {
         tooltip.text = text;
         position = item.mapToItem(base, position.x, position.y / 2);
diff --git a/resources/themes/cura/theme.json b/resources/themes/cura/theme.json
index 2ea7f138f6..f73360d439 100644
--- a/resources/themes/cura/theme.json
+++ b/resources/themes/cura/theme.json
@@ -44,6 +44,8 @@
     },
 
     "colors": {
+        "sidebar": [255, 255, 255, 255],
+
         "primary": [12, 169, 227, 255],
         "primary_hover": [34, 150, 190, 255],
         "primary_text": [255, 255, 255, 255],