You can change the style of your sold out shows by applying changes to the ".seated-event-link1-sold-out" class, as in the example below.
Find where you installed the Seated listings in your site code and add this style block just before.
<style>
.seated-event-link1-sold-out,
.seated-event-link1-sold-out:visited {
background:transparent !important;
color:red !important;
border:none !important;
}
.seated-event-link1-sold-out:hover,
.seated-event-link1-sold-out:hover:visited {
text-decoration:line-through;
border:none !important;
background: none !important;
color:red !important;
}
</style>
This example looks like this:
Note: To change other features of your Sold Out button, you can refer to the code in these articles: border color, hover style, font color, bold font, font size.