If you want to style the timer in the countdown, you can add HTML to your countdown messages, for example:

We are opening in <span class="open-countdown-timer">[time]</span>. Please check back later to see the store status.

Then you can style this class:

.close-countdown .close-countdown-timer{
	background-color: #d80000;
	color: #fff;
	border-radius: 3px;
	padding: 3px 5px;
}