fullcalendar background events: background color not shown in Safari / Firefox / IE
<p>I use the fullcalendar Scheduler add-on (<a href="http://fullcalendar.io/docs/scheduler/" rel="nofollow">http://fullcalendar.io/docs/scheduler/</a>)
When I use the code below, this background event is not coloured silver in Safari / Firefox /IE (no color at all...). It shows the silver color perfectly in Chrome.</p>

<pre><code>$('#calendar').fullCalendar({
events: [
    {
        start: '2016-04-01 06:00',
        end: '2014-04-01 10:00',
        rendering: 'background',
        color: 'silver',
        resourceId: 1
    }
]
</code></pre>

<p>});</p>

<p>How can I fix this issue?</p>

<p>Thanks in advance!</p>

<p>Kind regards,
Kim</p>