Global edge color not working

First at all, let me congratulate you for the work you have done. The library is just awesome!

Now, I don't know if I'm not using it right, but when I set the global color for edges nothing happens. Something like this:

network.setOptions({
    edges: {
        color: {
            color: '#cc0000',
            inherit: false
        }
    }
});

At first, I thought something was wrong with my code, or even with my browser, but I tried modifying the same properties in the 'Dynamic configuration' example and nothing happens there too. Global edge color is not supposed to be changed this way?