i'm trying to figure out how to bind angularjs scope vars into external css file the problem i think is the curly braces here is what i'm basically trying to do:

```
.css_class {background:{{ angular_variable }}; color:#ffffff;}

```

I found a similar question [here](https://stackoverflow.com/questions/18248437/angularjs-bind-variables-into-css-syntax) but the solution corresponds to inline css, but what if we need to externalize the template and the css properties?