Apply colors through the plugin options.
View the page source and read the Javascript code to see how it was done.
// Build items and set colors with plugin options
var items = [
{ id: 1, title: 'Done', content: 'Complete' },
{ id: 2, title: 'Working', content: 'In progress' }
];
var $container = jQuery('#jq-theme-tl .timeline__items');
items.forEach(function (it) {
$container.append('' + it.title + '
' + it.content + '
');
});
jQuery('#jq-theme-tl').timeline({
mode: 'vertical',
nodeColor: '#FF9800',
lineColor: '#FFB74D'
});