Today Google announced a new-look Google +1 button that matches the new Google+ theme. Traditionally the +1 button was a white box with a blue +1 that turned a very loud royal blue when clicked.
The +1 button was launched nearly a month before the Google+ network and had looked quite different. Until now. The new +1 buttons resemble the reddish Google+ badges and widgets:
If you are looking for different sizes, type see the Google +1 configuration tool for all the various button sizes. The changes will be pushed out to the public automatically – no need to update any existing code.
For more information, see the Google+ developers blog.