Vex Dialog — Custom Button Styling

CSS

</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<script src="http://github.hubspot.com/vex/js/vex.js"></script>
<script src="http://github.hubspot.com/vex/js/vex.dialog.js"></script>
<link href="http://github.hubspot.com/vex/css/vex.css" rel="stylesheet" />
<link href="http://github.hubspot.com/vex/css/vex-theme-os.css" rel="stylesheet" />
<style>
.vex .my-button-class-name {
    color: red;
}

JavaScript

vex.dialog.confirm({
    className: 'vex-theme-os',
    message: 'Are you absolutely sure you want to destroy the alien planet?',
    callback: function (value) {
        if (value) {
            console.log('Successfully destroyed the planet.')
        } else {
            console.log('Chicken.')
        }
    }
});