DevTools: Drop color intensity of DOM symbols for readability

Source/devtools/front_end/ui/inspectorSyntaxHighlight.css

 /*
  * Copyright (C) 2009 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 39 matching lines @@
 .cm-xml-tag {color: rgb(136, 18, 128);}
 .cm-xml-attribute {color: rgb(153, 69, 0);}
 .cm-xml-link {color: #00e;}
 
 .webkit-html-comment {
     /* Keep this in sync with view-source.css (.webkit-html-comment) */
     color: rgb(35, 110, 37);
 }
 
 .webkit-html-tag {
+    color: rgb(168, 148, 166);
+}
+
+.webkit-html-tag-name, .webkit-html-close-tag-name {
     /* Keep this in sync with view-source.css (.webkit-html-tag) */
     color: rgb(136, 18, 128);
 }
 
 .webkit-html-pseudo-element {
     /* This one is non-standard. */
     color: brown;
 }
 
 .webkit-html-js-node,
@@ skipping 48 matching lines @@
 .webkit-html-external-link:hover {
     /* Keep this in sync with view-source.css (.webkit-html-external-link:hover) */
     text-decoration: underline;
 }
 
 .webkit-html-end-of-file {
     /* Keep this in sync with view-source.css (.webkit-html-end-of-file) */
     color: rgb(255, 0, 0);
     font-weight: bold;
 }