ISSUE-167 (color-code tab): Add color coding to 'Tab' key [DOM3 Events]

ISSUE-167 (color-code tab): Add color coding to 'Tab' key [DOM3 Events]

http://www.w3.org/2008/webapps/track/issues/167

Raised by: Doug Schepers
On product: DOM3 Events

David Flanagan <http://lists.w3.org/Archives/Public/www-dom/2010OctDec/0065.html>:
[[
12) Minor typo in the 3rd bullet after keydown: You should probably have 
a little blue box around the Tab key.  Also, is it okay to hardcode Tab, 
Enter and Space here or do you need to do some kind of OS-dependent 
hand-waving to account for the possibility of operating systems that use 
different keys for moving keyboard focus and activating UI elements?
]]