Hi! After git blaming it :-p , it seems that this is @jmcanterafonseca 's code. It is also used in https://github.com/mozilla-b2g/gaia/blob/master/apps/communications/contacts/style/contacts.css#L523 (git blames you of this code :-p ) and https://github.com/mozilla-b2g/gaia/blob/master/apps/communications/contacts/style/status.css#L10 (git blames @jmcanterafonseca ). Sincerely, I just reused this code. @jmcanterafonseca , can you tell us anything about this 1001 value? Thanks! ;-)