ie looks like: <http://twitterbootstrap3navbars.w3masters.nl/> but without using raw css, I want to write this into my less files...

In my less.variables I already tried this:

```
@navbar-gradient:   linear-gradient(top, @navbar-default-pre-color 0%, @navbar-default-pre-color 50%, @navbar-default-pre-color 51%, @navbar-default-pre-color 100%);

@navbar-default-bg:                @navbar-gradient;

```

In chrome the navbar just showed up black, I tried changeing it from background color to: just background, background-image etc (in the chrome developer tools that let you edit the css right on the page).

Any ideas?