diff --git a/src/sass/gtk/_applications-3.0.scss b/src/sass/gtk/_applications-3.0.scss
index c24605c5..7d5f7fcb 100644
--- a/src/sass/gtk/_applications-3.0.scss
+++ b/src/sass/gtk/_applications-3.0.scss
@@ -1981,6 +1981,26 @@ viewswitcherbar > actionbar { // Gnome 3.38
   border: none;
 }
 
+//
+// Gnome Calendar
+//
+
+window.background.org-gnome-Calendar {
+  .week-view weekgrid {
+    event.color-light {
+      &, & > stack > grid > label {
+        color: rgba(black, 0.75);
+      }
+    }
+
+    event.color-dark {
+      &, & > stack > grid > label {
+        color: rgba(white, 1);
+      }
+    }
+  }
+}
+
 //
 // Polari
 //
diff --git a/src/sass/gtk/_applications-4.0.scss b/src/sass/gtk/_applications-4.0.scss
index 5d0c9615..73a08d6a 100644
--- a/src/sass/gtk/_applications-4.0.scss
+++ b/src/sass/gtk/_applications-4.0.scss
@@ -1514,6 +1514,26 @@ viewswitcherbar > actionbar { // Gnome 3.38
   border: none;
 }
 
+//
+// Gnome Calendar
+//
+
+window.background.org-gnome-Calendar {
+  .week-view weekgrid {
+    event.color-light {
+      &, & > stack > grid > label {
+        color: rgba(black, 0.75);
+      }
+    }
+
+    event.color-dark {
+      &, & > stack > grid > label {
+        color: rgba(white, 1);
+      }
+    }
+  }
+}
+
 //
 // Polari
 //