This is going in the wrong direction. "Grey" doesn't indicate anything to the user. Instead, they should make HTTP sites show up with a yellow triangle, because

This is going in the wrong direction. "Grey" doesn't indicate anything to the user. Instead, they should make HTTP sites show up with a yellow triangle, because they aren't secure. It's also a little silly to claim that it's hard to move to HTTPS all at once. Most sites are served up with web server such as Apache/nginx/etc. that wraps everything served up: it's easy implement HTTPS at that level. The other common option is a cloud service provider, and that's only a bit harder. So no, this is not hard. I venture I could move most sites to 100% HTTPS in an afternoon if I had knowledge of the site, but even if you haven't done this before, there's no reason you can't do this in a week.