What Google logo can i use on my site

Question

I have may be a strange question, but i haven't found any information about that in internet. I'm developing website with openId authentication via google account and want to put google logo as link for login. The question is what Google logo can I officially use without violation any legal terms?

Answer 1

After searching for quite some time, I come to the concluion that one should be able to use the Google logo at least as shown here, on the Google web site: https://developers.google.com/google-apps/marketplace/integrate There is obviously multiple UIs for this "sign in with Google" button that are accepted.

There are additional guidelines for using the Google brand here: developers.google.com/google-apps/marketplace/branding

This applies for Google Apps developers: not sure about other situations. Information on this topic is really scarce. The issue is mentioned here for instance: https://groups.google.com/forum/?fromgroups=#!topic/google-federated-login-api/oG5gk10W-R0 , but still, not precise answers.

Answer 2

I don't like the red google plus signin button because it is a google oauth not necessarily a google+ signin. You do not need a google+ account but a google account to sign in.

So I found the official page where you are able to download the official blue icons:

https://developers.google.com/identity/branding-guidelines#google-signin-button

Answer 3

Google provides sign-in with g+ buttons and guidelines here — these are pretty specific and has links to actual image files that are authorized.

https://developers.google.com/+/branding-guidelines

Answer 4

One thing I found was that for Omniauth, they have a repository of icons for use with their different authentication providers, so it seems like the icon here is probably safe to use (most sites seem to use something similar).

https://github.com/intridea/authbuttons

But I agree, it's very annoying that there's no definitive branding page for Google auth, only Google+.

Answer 5

Start here http://www.google.com/permissions/guidelines.html

Answer 6

I used the G+ icon from https://developers.google.com/+/branding-guidelines. Hope this helps!