Hot'n'Cold shows a different colored badge for every post, depending if the post is "hot", "medium" or "cold",
The default badges are:
As of now, you can only edit the text by going directly in the plugin file hotncold.php
You can customize the badges from the hotncold.css file in the plugin folder, if you want to add images instead of using CSS3.
However, if you update the plugin those changes will be lost.
If you simply want to make the badges bigger or change font (stylistic changes), we advise you do that in your theme style.css instead, using the div class
You may want to add
!important to your CSS statements, if after customizing the div class
hotncold you see no change.
Please bare in mind that this is a free plugin, that the time to work on it is limited and that we do our best anyway to give everybody a cool free plugin. So if something doesn't work as you expected please report it in the WordPress Support Forum, we'll do our best to help you out. Thanks for understanding.