diff --git a/resources/themes/cura-dark/theme.json b/resources/themes/cura-dark/theme.json
index 520f863972..5f9ab2cc2d 100644
--- a/resources/themes/cura-dark/theme.json
+++ b/resources/themes/cura-dark/theme.json
@@ -151,6 +151,7 @@
         "checkbox_border": [255, 255, 255, 38],
         "checkbox_border_hover": [255, 255, 255, 38],
         "checkbox_mark": [255, 255, 255, 181],
+        "checkbox_square": [118, 118, 118, 255],
         "checkbox_text": [255, 255, 255, 181],
 
         "tooltip": [39, 44, 48, 255],