The oblique panels should have the following markup:

<div class="oblique"> 
  <div class="main-block-oblique skew-block">
    <div class="skew-block-repeat">
      <a href="menu–stretched.html">
        <div class="oblique-inner"> 
          <div class="image-wrapper">
            <div class="main-image">
              <img class="image-img" src="images/your_panel_img.jpg" alt=""> 
            </div>
          </div>
        </div> 
        <div class="oblique-caption">
          <h2>your_panel_title</h2>
          <h5>your_panel_subtitle</h5>
        </div> 
      </a>
    </div>
    <div class="skew-block-repeat">[...] another panel </div>
    <div class="skew-block-repeat">[...] another panel </div>
  </div>
</div>

A good example can be found in home-oblique.html file near line 277.

Also the code which is used for panels design can be found in app/css/scss/template.scss near line 1526.