I have a font loading in my HTML from a web template:
<link href='http://fonts.googleapis.com/css?family=Open+Sans:300' rel='stylesheet' type='text/css'>
What does the ":300" mean and do?
It primarly sets the font-weight
for the CSS that is generated. But it also changes the source font-family also.
Ex.
Compare your link vs http://fonts.googleapis.com/css?family=Open+Sans:800