<div class="uk-section uk-section-default uk-flex uk-flex-middle" uk-height-viewport>
    <div class="uk-width-1-1">
        <div class="uk-container uk-text-center">

            <span class="uk-label">Default</span>
            <span class="uk-label uk-label-success">Success</span>
            <span class="uk-label uk-label-warning">Warning</span>
            <span class="uk-label uk-label-danger">Danger</span>

        </div>
    </div>
</div>