diff --git a/preferences/templates/mobile/app.css b/preferences/templates/mobile/app.css
index 53a344b268..125a8cf71d 100644
--- a/preferences/templates/mobile/app.css
+++ b/preferences/templates/mobile/app.css
@@ -148,3 +148,12 @@ tr.prefRow > td textarea.prefValue {
 div#preferences-settings_tabs {
   margin-bottom: 65px;
 }
+/* tablets and smartphones  */
+@media all {
+  body .popupMainDiv .et2_button_text.plus_button,
+  body .popupMainDiv .et2_button_with_image.plus_button {
+    background-color: #0c5da5 !important;
+    height: 60px !important;
+    background-position: center !important;
+  }
+}
diff --git a/preferences/templates/mobile/app.less b/preferences/templates/mobile/app.less
index 6801cfa176..c4b42ece12 100644
--- a/preferences/templates/mobile/app.less
+++ b/preferences/templates/mobile/app.less
@@ -34,4 +34,16 @@ tr.prefRow > td {
 }
 div#preferences-settings_tabs {
     margin-bottom: 65px;
+}
+/* tablets and smartphones  */
+@media all {
+	body {
+		.popupMainDiv {
+			.et2_button_text.plus_button, .et2_button_with_image.plus_button {
+				background-color: #0c5da5 !important;
+				height: 60px !important;
+				background-position: center !important;
+			}
+		}
+	}
 }
\ No newline at end of file