title: I can't change the fill color of a SVG Sprite
body: <p>I have this <a href="http://codepen.io/anon/pen/gpyMxV" rel="noreferrer">pen</a> where I have made an example of the SVG Sprites Technique:</p>
  <p>And I want to apply this with CSS:</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.circle {
      fill: #f00;
  }
  .polyline {
      fill: #00f;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;svg xmlns="http://www.w3.org/2000/svg"style="position:absolute;top:-9999px;opacity:0;"&gt;    
          &lt;symbol viewBox="0 0 64 64" id="circle"&gt;
              &lt;title&gt;circle&lt;/title&gt;
                  &lt;path fill="#1D1D1B" d="M32,0C14.327,0,0,14.327,0,32c0,17.673,14.327,32,32,32s32-14.327,32-32C64,14.327,49.673,0,32,0z M32,52.5c-11.322,0-20.5-9.178-20.5-20.5S20.678,11.5,32,11.5S52.5,20.678,52.5,32S43.322,52.5,32,52.5z"/&gt;
          &lt;/symbol&gt;
          &lt;symbol viewBox="0 0 56.983 64.804" id="polyline"&gt;
              &lt;title&gt;polyline&lt;/title&gt;
                  &lt;polyline fill="#1D1D1B" points="0,64.804 30.726,0 56.983,0 56.983,54.749 29.33,27.095 "/&gt;
          &lt;/symbol&gt;
      &lt;/svg&gt;
  
      &lt;svg class="circle"&gt;
          &lt;use xlink:href="#circle"&gt;&lt;/use&gt;
      &lt;/svg&gt;
  
      &lt;svg class="polyline"&gt;
          &lt;use xlink:href="#polyline"&gt;&lt;/use&gt;
      &lt;/svg&gt;</code></pre>
  </div>
  </div>
  </p>
  <p>My problem is that I'm not able to change the fill color of the elements added to the spritesheet. I have looked for information about how to do this correctly and I think my approach it's correct but it seems that it's not like that.</p>
  <p>In this other <a href="http://codepen.io/team/lincolnloop/details/GgdLBa" rel="noreferrer">pen</a>, wrote in the same way I think, is working fine. What am I doing wrong?</p>
  <p>Sorry for my english if I have made any mistake, it's not my native language.</p>