diff --git a/gtk-3.0/_apps.scss b/gtk-3.0/_apps.scss
index c8193c8..57cdcb1 100755
--- a/gtk-3.0/_apps.scss
+++ b/gtk-3.0/_apps.scss
@@ -7,6 +7,7 @@
 @import 'apps/xfce';
 @import 'apps/pantheon';
 @import 'apps/unity';
+@import 'apps/mate';
 
 /***********************
  * App-Specific Styles *
diff --git a/gtk-3.0/apps/_mate.scss b/gtk-3.0/apps/_mate.scss
new file mode 100644
index 0000000..05c9b41
--- /dev/null
+++ b/gtk-3.0/apps/_mate.scss
@@ -0,0 +1,20 @@
+//
+// Mate OSD Window
+//
+
+MsdOsdWindow.background.osd {
+    border-radius: 2px;
+    border: 1px solid $borders_color;
+  
+    .progressbar {
+      background-color: $selected_bg_color;
+      border: none;
+      border-color: $selected_bg_color;
+      border-radius: 5px;
+    }
+    .trough {
+      background-color: darken($osd_bg_color, 5%);
+      border: none;
+      border-radius: 5px;
+    }
+  }
\ No newline at end of file
diff --git a/gtk-3.0/gtk-dark.css b/gtk-3.0/gtk-dark.css
index 5962ff7..829b98e 100755
--- a/gtk-3.0/gtk-dark.css
+++ b/gtk-3.0/gtk-dark.css
@@ -5710,7 +5710,7 @@ window.background.budgie-settings-window.csd > box.horizontal > stack > scrolled
   transition: none;
   box-shadow: none; }
   #gnc-id-main-window .arrow.button.toggle:hover {
-    border-color: #F67E7D; }
+    border-color: #c50ed2; }
 
 .xfce4-panel.panel {
   background-color: #181b28;
@@ -6136,6 +6136,19 @@ SheetStyleDialog.unity-force-quit {
   animation: playbackmenuitem_spinner 1s infinite linear;
   color: #c50ed2; }
 
+MsdOsdWindow.background.osd {
+  border-radius: 2px;
+  border: 1px solid rgba(12, 14, 21, 0.8); }
+  MsdOsdWindow.background.osd .progressbar {
+    background-color: #c50ed2;
+    border: none;
+    border-color: #c50ed2;
+    border-radius: 5px; }
+  MsdOsdWindow.background.osd .trough {
+    background-color: rgba(7, 8, 11, 0.98);
+    border: none;
+    border-radius: 5px; }
+
 /***********************
  * App-Specific Styles *
  ***********************/
diff --git a/gtk-3.0/gtk.css b/gtk-3.0/gtk.css
index 5962ff7..829b98e 100755
--- a/gtk-3.0/gtk.css
+++ b/gtk-3.0/gtk.css
@@ -5710,7 +5710,7 @@ window.background.budgie-settings-window.csd > box.horizontal > stack > scrolled
   transition: none;
   box-shadow: none; }
   #gnc-id-main-window .arrow.button.toggle:hover {
-    border-color: #F67E7D; }
+    border-color: #c50ed2; }
 
 .xfce4-panel.panel {
   background-color: #181b28;
@@ -6136,6 +6136,19 @@ SheetStyleDialog.unity-force-quit {
   animation: playbackmenuitem_spinner 1s infinite linear;
   color: #c50ed2; }
 
+MsdOsdWindow.background.osd {
+  border-radius: 2px;
+  border: 1px solid rgba(12, 14, 21, 0.8); }
+  MsdOsdWindow.background.osd .progressbar {
+    background-color: #c50ed2;
+    border: none;
+    border-color: #c50ed2;
+    border-radius: 5px; }
+  MsdOsdWindow.background.osd .trough {
+    background-color: rgba(7, 8, 11, 0.98);
+    border: none;
+    border-radius: 5px; }
+
 /***********************
  * App-Specific Styles *
  ***********************/