diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 5bf0e958d0..ac0d05d0bd 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -4567,6 +4567,22 @@ stackswitcher button.text-button.circular { // FIXME aggregate with buttons
   padding: 0;
 }
 
+/*************
+ * App Icons *
+ *************/
+/* Outline for low res icons */
+.lowres_icon {
+icon-shadow: 1px 1px rgba(0,0,0,0.3),
+             -1px -1px rgba(0,0,0,0.3),
+             -1px 1px rgba(0,0,0,0.3),
+             1px -1px rgba(0,0,0,0.3);
+}
+
+/* Drapshadow for large icons */ 
+.icon_dropshadow {
+  icon-shadow: 0 2px 12px rgba(0,0,0,0.2), 
+               0 1px 2px rgba(0,0,0,0.7);
+}
 
 /*********
  * Emoji *
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index 58ca68c8ff..fd0c7cf926 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -1931,6 +1931,13 @@ stackswitcher button.text-button { min-width: 100px; }
 
 stackswitcher button.circular, stackswitcher button.text-button.circular { min-width: 32px; min-height: 32px; padding: 0; }
 
+/************* App Icons * */
+/* Outline for low res icons */
+.lowres_icon { icon-shadow: 1px 1px rgba(0, 0, 0, 0.3), -1px -1px rgba(0, 0, 0, 0.3), -1px 1px rgba(0, 0, 0, 0.3), 1px -1px rgba(0, 0, 0, 0.3); }
+
+/* Drapshadow for large icons */
+.icon_dropshadow { icon-shadow: 0 2px 12px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.7); }
+
 /********* Emoji * */
 popover.emoji-picker { padding-left: 0; padding-right: 0; }
 
@@ -2023,7 +2030,7 @@ these colors are exported for the window manager and shouldn't be used in applic
 read if you used those and something break with a version upgrade you're on your own... */
 @define-color wm_title shade(#eeeeec, 1.8);
 @define-color wm_unfocused_title #919494;
-@define-color wm_highlight transparent;
+@define-color wm_highlight rgba(0, 0, 0, 0);
 @define-color wm_borders_edge rgba(238, 238, 236, 0.07);
 @define-color wm_bg_a shade(#33393b, 1.2);
 @define-color wm_bg_b #33393b;
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 912018d595..a61d7bc169 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -1951,6 +1951,13 @@ stackswitcher button.text-button { min-width: 100px; }
 
 stackswitcher button.circular, stackswitcher button.text-button.circular { min-width: 32px; min-height: 32px; padding: 0; }
 
+/************* App Icons * */
+/* Outline for low res icons */
+.lowres_icon { icon-shadow: 1px 1px rgba(0, 0, 0, 0.3), -1px -1px rgba(0, 0, 0, 0.3), -1px 1px rgba(0, 0, 0, 0.3), 1px -1px rgba(0, 0, 0, 0.3); }
+
+/* Drapshadow for large icons */
+.icon_dropshadow { icon-shadow: 0 2px 12px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.7); }
+
 /********* Emoji * */
 popover.emoji-picker { padding-left: 0; padding-right: 0; }