Tanriol/digest — pull request #22 by Infocatcher (2013-05-24 19:20:40+00:00)
Title: Use grayscale icon, if all feeds are readed

I requested this some years (d'oh!) ago for Brief (and just applied the patch for my local copy after all):
http://web.archive.org/web/20120109021913/http://brief.mozdev.org/drupal/node/824?page=1#comment-3424