How to Customize Blogger Comments By Adding a Background Color and Border

The first method is the easiest: we'll separate our comments by adding a border below each of them.

How to Add a Separator/Border To Blogger Comments

Step 1. To add a simple separator go toTemplate > Edit HTML and click on the small arrow on the left of <b:skin>...</b:skin>

Step 2. Click anywhere inside the code area and search using CTRL + F keys, for the following piece of code:

]]></b:skin>

Step 3. ]]></b:skin> ကို​ေတြ႔ရင္​ သူ႔ရဲ႕အ​ေပၚက​ေန ​ေအာက္​ကကုဒ္​ကို ထည္​့​ေပးပါ :

- If we are using threaded comments (with the reply option):

.comment-block {
border-bottom: 1px solid #000000;
}
.comments .continue {
  border-top: 0px solid #000;
}

Note: To change the border's color, replace the bolded color value and to change its thickness, increase/decrease the 1 value.

Step 4. Save the Template.

Instead of a simple border, we can also add a divider/image between our comments.

How to Add a Divider (Image) Between Each Comment in Blogger

Step 1. Go to Template > Edit HTML and search (CTRL + F) for the following piece of code:

]]></b:skin>

Screenshot:

Step 2.  ​ေအာက္​ကကုဒ္​ကို ]]></b:skin>ရဲ႕အ​ေပၚမွာ ထည္​့​ေပးပါ

- If we are using threaded comments (with the reply option): 

.comment-block {
background-image:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxdwC9-HVXfVNwc3SwNmxC20ngL_EBQLdbdrjggUfy7gb1cgHGk_kllnX-K_7yM2XaXwzQdkMe-SLpHm29kUU7L5iRN8UmTQ0hh4zExPzqzKaoGYAcRlS2yik6UokoVMpAidzAJDp61-m2/s1600/74.gif);
background-repeat:no-repeat;
background-position:center bottom;
padding-bottom:30px;
margin-top: -10px;
}
.comments .continue {
border-top: 0px solid #000;
}

Note: The URL that is in blue represents the image that you can change as you like, just remember that at the height must set the height of an image with 30px more, for instance, if the image's height is 50px then the value will be 80px. This is for making sure that the image won't overlap the date of comments. (for threaded comments, increase/decrease the padding 30 value)

Step 3. Save the Template.

But you can still have more styles for each comment, for example adding a background color and a border.

How to Add A Border and A Background Color To Blogger Comments

Step 1. Go to Template > Edit HTML and search for the following piece of code:

]]></b:skin>

Step 2. Paste the following just above it:​ေအာက္​ကကုဒ္​ကို ]]></b:skin>ရဲ႕အ​ေပၚမွာ ထည္​့​ေပးပါ

- If we are using threaded comments (with the reply option): 

.comment-block {
background:#F9F9F9; /* Background Color */
border: 1px solid #f1f1f1; /* Border style */
margin-bottom:20px;
-webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .4);
-moz-box-shadow: 0 1px 2px rgba(0, 0, 0, .4);
box-shadow: 0 1px 2px rgba(0, 0, 0, .4);
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
}
.comments .comment-thread.inline-thread {
background-color: #FAFAFA; /* Background color behind the replies */
border-left: 4px dotted #E6E6E6; /* Border on the left side of replies */
}
.comment-content {
padding:2px 10px 10px 10px;
color:#444444; /* Font Color in Comments */
}
.datetime a {
font-style:italic;
font-size:9px;
margin-left: 2px;
}
.comments .comments-content .user a{
color:#1982D1; /* Author's name color */
font-size: 12px; /* Author's name size */
padding-left: 10px;
font-weight:bold;
text-decoration:none;
}
.comments .comment .comment-actions a,.comments .comment .continue a{
display:inline-block;
margin:0 0 10px 10px;
padding:0 15px;
color:#B4B4B7;
text-align:center;
text-decoration:none;
background:#F8F8FB;
border:1px solid #C2C2C5;
border-radius:4px;
height:20px;
line-height:20px;
font-weight:normal;
cursor:pointer;
}
.comments .continue {
border-top: 0px solid #000;
}
.comments .comments-content .icon.blog-author {
background-image: none;
margin-left: -10px;
}
.comments .avatar-image-container{
margin: 0px 0px 0px 0px;
padding: 0px 0px 0px 0px;
width: 40px;
max-height: 40px;
border: 1px solid #F2F2F2;
padding: 1px;
}
.comments .avatar-image-container img{
margin: 0px 0px 0px 0px;
padding: 0px 0px 0px 0px;
max-width: 40px;
height: 40px;
}

Step 3. Save the Template.