diff --git a/gtk/theme/HighContrast/_common.scss b/gtk/theme/HighContrast/_common.scss
index 62099bd6aa..aacd667f8b 100644
--- a/gtk/theme/HighContrast/_common.scss
+++ b/gtk/theme/HighContrast/_common.scss
@@ -163,7 +163,6 @@ label {
 
 spinner {
   background-image: none;
-  background-color: blue;
   opacity: 0; // non spinning spinner makes no sense
   -gtk-icon-source: -gtk-icontheme('process-working-symbolic');
   &:checked {
diff --git a/gtk/theme/HighContrast/gtk.css b/gtk/theme/HighContrast/gtk.css
index 72e0702409..692a9053b1 100644
--- a/gtk/theme/HighContrast/gtk.css
+++ b/gtk/theme/HighContrast/gtk.css
@@ -130,7 +130,6 @@ label:disabled, label:backdrop:disabled {
     -gtk-icon-transform: rotate(1turn); } }
 spinner {
   background-image: none;
-  background-color: blue;
   opacity: 0;
   -gtk-icon-source: -gtk-icontheme("process-working-symbolic"); }
   spinner:checked {