Update Yii2TimerCountDown.php

Author: aneeshikmat

Yii2TimerCountDown.php

@@ -136,7 +136,7 @@ public function registerClientScript()
 
         $template1 = <<<temp1
             #$this->countDownIdSelector .item-counter-down {
-                background: #000;
+                background: #c0c0c0;
                 display: inline-block;
                 padding: 15px;
                 font-size: 45px;