diff --git a/theme/colors/dark.css b/theme/colors/dark.css
index 198ccfe..f2cee76 100644
--- a/theme/colors/dark.css
+++ b/theme/colors/dark.css
@@ -12,6 +12,7 @@
 		/* Accent */
 		--gnome-accent-bg: #3584e4;
 		--gnome-accent: #78aeed;
+		--gnome-selection-bg: rgba(53, 132, 228, .25);
 
 		/* Toolbars */
 		--gnome-toolbar-background: var(--gnome-headerbar-background);
diff --git a/theme/colors/light.css b/theme/colors/light.css
index 7a71609..f9c8e1c 100644
--- a/theme/colors/light.css
+++ b/theme/colors/light.css
@@ -11,6 +11,7 @@
 	/* Accent */
 	--gnome-accent-bg: #3584e4;
 	--gnome-accent: #1c71d8;
+	--gnome-selection-bg: rgba(53, 132, 228, .45);
 
 	/* Toolbars */
 	--gnome-toolbar-background: var(--gnome-headerbar-background);
diff --git a/theme/parts/toolbox.css b/theme/parts/toolbox.css
index 7965e34..4ac7cca 100644
--- a/theme/parts/toolbox.css
+++ b/theme/parts/toolbox.css
@@ -147,6 +147,11 @@ findbar:-moz-window-inactive description,
 	color: var(--gnome-accent) !important;
 }
 
+/* Selection*/
+*::-moz-selection {
+	background-color: var(--gnome-selection-bg) !important;
+}
+
 /* OPTIONAL: Hide WebRTC indicator */
 @supports -moz-bool-pref("gnomeTheme.hideWebrtcIndicator") {
 	#webrtcIndicator {