The progress bars indicate to the user that an action is in progress. minstyle.io offers several styles and colors :
<div class="ms-progress">
<div class="ms-progress-fill" style="width: 20%;">20%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-blue" style="width: 30%;">30%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-green" style="width: 40%;">40%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-red" style="width: 50%;">50%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-yellow" style="width: 60%;">60%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-gradient" style="width: 70%;">70%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-blue" style="width: 65%;">65%</div>
<div class="ms-progress-fill ms-green" style="width: 35%;">35%</div>
</div>
<div class="ms-progress">
<div class="ms-progress-fill ms-green ms-rounded ms-striped" style="width: 67%;">Loading...</div>
</div>
<div class="ms-progress ms-small">
<div class="ms-progress-fill ms-yellow" style="width: 23%;">Small</div>
</div>
<div class="ms-progress ms-large">
<div class="ms-progress-fill ms-yellow" style="width: 23%;">Large</div>
</div>
<div class="ms-progress ms-rounded">
<div class="ms-progress-fill ms-red ms-rounded" style="width: 50%;">Rounded</div>
</div>