Add the google+ add to circles widget to your website or blogger may help your site visitors to add to your google profile circles.This widget has also a features of customization with colors according to match your template.so to add google+ widget.
Go to google+ official widget site and click on Google widget button and add your google+ profile id if you don't know your id you can see my older post how to get your google+id? and add your custom colors and click on get code button,copy the code and paste it into your blogger or website.