Highlight Author’s Comment

Have you ever seen this on blogs where author’s comments are distinguished from other comments? Well this is a simple and easy trick.
First you need to open your style.css in your template folder and add the following:

1	.authorstyle { background-color: #B3FFCC !important; }

Then you need to open your comments.php which is also located in your themes folder and find the code that looks some what like this:

1	<li <?php echo $oddcomment; ?>id="comment-<?php comment_ID() ?>"></li>

Replace it with:

1	<li class="<?php if ($comment->user_id == 1) $oddcomment = "authorstyle"; echo $oddcomment; ?>"></li>

Note you must change 1 to the user id of the author. Once you do this, your blog comments will have a different background for the author’s comment compared to the rest.
Thanks to Matt Cutts for this tutorial.