Google now shows a red “sign in” button on the homepage, at the top of the search results pages, in Google Maps, Google News, Google Translate and many other services.

The button is a lot more visible than the old gray “sign in” button.

Here’s the Google Image Search homepage in Internet Explorer. The red button clearly stands out from all the other promotional messages.

After the Gmail sign in page, Google’s standard sign in page also has a new interface: “One password. All of Google. Want to enjoy the best of Google? Just stay signed in. One username and password is all you need to unlock more features from services you use every day, like Gmail, Maps, Google+, and YouTube.

{ Thanks, Jérôme. }