Adjust padding values.

services/web/public/stylesheets/core/_common-variables.less

@@ -929,6 +929,8 @@
 @chat-message-name-color          : @gray-light;
 @chat-message-box-shadow          : -1px 2px 3px #ddd;
 @chat-message-border-radius       : 0;
+@chat-message-padding             : @line-height-computed / 2;
+@chat-message-weight              : normal;
 @chat-new-message-bg              : @gray-lightest;
 @chat-new-message-textarea-bg     : #FFF;
 @chat-new-message-textarea-color  : @gray-dark;

services/web/public/stylesheets/core/ol-variables.less

@@ -204,12 +204,14 @@
 @editor-border-color              : @ol-blue-gray-5;
 
 // Chat
-@chat-bg                          : @ol-blue-gray-6;
+@chat-bg                          : @ol-blue-gray-5;
 @chat-message-color               : #FFF;
 @chat-message-name-color          : #FFF;
-@chat-message-date-color          : @ol-blue-gray-3;
+@chat-message-date-color          : @ol-blue-gray-2;
 @chat-message-box-shadow          : none;
-@chat-message-border-radius       : @border-radius-base;
+@chat-message-padding             : 5px 10px;
+@chat-message-border-radius       : @border-radius-large;
+@chat-message-weight              : bold;
 @chat-new-message-bg              : @ol-blue-gray-4;
 @chat-new-message-textarea-bg     : @ol-blue-gray-1;
 @chat-new-message-textarea-color  : @ol-blue-gray-6;