diff --git a/lib/jsduck/tag/deprecated.rb b/lib/jsduck/tag/deprecated.rb
index d2f3971a2bd7f5f37c66381ba78ed359b3a67400..83b0c78219d0c561bf9b09ab92301ec198883d5f 100644
--- a/lib/jsduck/tag/deprecated.rb
+++ b/lib/jsduck/tag/deprecated.rb
@@ -4,10 +4,14 @@ module JsDuck::Tag
   class Deprecated < DeprecatedTag
     def initialize
       @tagname = :deprecated
+      @msg = "This {TAGNAME} has been <strong>deprected</strong>"
       @css = <<-EOCSS
         .signature .deprecated {
           background-color: #aa0000;
         }
+        .deprecated-box {
+          border: 2px solid #aa0000;
+        }
         .deprecated-box strong {
           color: white;
           background-color: #aa0000;
diff --git a/lib/jsduck/tag/deprecated_tag.rb b/lib/jsduck/tag/deprecated_tag.rb
index b76cfc486fe161f8f472ecc581185cb2903ca438..322b683c3ae93c40f6cd796ca882dfd29a4e4027 100644
--- a/lib/jsduck/tag/deprecated_tag.rb
+++ b/lib/jsduck/tag/deprecated_tag.rb
@@ -2,14 +2,15 @@ require "jsduck/tag/tag"
 
 module JsDuck::Tag
   # Base class for both @deprecated and @removed.  Child classes only
-  # need to define the @tagname attribute and call #super - all the
-  # correct behavior will the fall out automatically.
+  # need to define the @tagname and @msg attributes and call #super -
+  # all the correct behavior will the fall out automatically.
   class DeprecatedTag < Tag
     def initialize
       if @tagname
         @pattern = @tagname.to_s
         @signature = {:long => @tagname.to_s, :short => @tagname.to_s[0..2].upcase}
         @html_position = POS_DEPRECATED
+        @since = "since" unless @since
         @css += <<-EOCSS
           .deprecated-tag-box {
             text-align: center;
@@ -45,10 +46,11 @@ module JsDuck::Tag
 
     def to_html(context)
       depr = context[@tagname]
-      v = depr[:version] ? "since " + depr[:version] : ""
+      msg = @msg.sub(/\{TAGNAME\}/, context[:tagname].to_s)
+      v = depr[:version] ? "#{@since} " + depr[:version] : ""
       <<-EOHTML
         <div class='rounded-box #{@tagname}-box deprecated-tag-box'>
-        <p>This #{context[:tagname]} has been <strong>#{@tagname}</strong> #{v}</p>
+        <p>#{msg} #{v}</p>
         #{depr[:text]}
         </div>
       EOHTML
diff --git a/lib/jsduck/tag/experimental.rb b/lib/jsduck/tag/experimental.rb
new file mode 100644
index 0000000000000000000000000000000000000000..66c98e25c30fe482f89e20e768eba4aa8aff36b6
--- /dev/null
+++ b/lib/jsduck/tag/experimental.rb
@@ -0,0 +1,28 @@
+require "jsduck/tag/deprecated_tag"
+
+module JsDuck::Tag
+  class Experimental < DeprecatedTag
+    def initialize
+      @tagname = :experimental
+      @msg = "This {TAGNAME} is <strong>experimental</strong>"
+      @since = "Introduced in"
+      # dashed border
+      @css = <<-EOCSS
+        .signature .experimental {
+          color: #a00;
+          border: 1px dashed #a00;
+          background-color: #fee;
+        }
+        .experimental-box {
+          border: 2px dashed #ccc;
+        }
+        .experimental-box strong {
+          margin: 0 3px;
+          border: 2px dashed #a00;
+          color: #a00;
+        }
+      EOCSS
+      super
+    end
+  end
+end
diff --git a/lib/jsduck/tag/removed.rb b/lib/jsduck/tag/removed.rb
index f5a01cb1c0b42ed5e28ac387ca441dfb8c3ef4b8..50ce994dd729e1f765b342af3fca04dd0016abe7 100644
--- a/lib/jsduck/tag/removed.rb
+++ b/lib/jsduck/tag/removed.rb
@@ -7,6 +7,7 @@ module JsDuck::Tag
   class Removed < DeprecatedTag
     def initialize
       @tagname = :removed
+      @msg = "This {TAGNAME} has been <strong>removed</strong>"
       # striked-through text with red border.
       @css = <<-EOCSS
         .signature .removed {
@@ -15,9 +16,12 @@ module JsDuck::Tag
           border: 1px solid #aa0000;
           text-decoration: line-through;
         }
+        .removed-box {
+          border: 2px solid #aa0000;
+        }
         .removed-box strong {
           color: #aa0000;
-          border: 1px solid #aa0000;
+          border: 2px solid #aa0000;
           background-color: transparent;
           text-decoration: line-through;
         }