title: Windows 10/Edge pinned site tiles - caching/refreshing and inaccurate tile color rendering
body: <p>Not sure if this is an Edge or more general Windows 10 question, but trying to get pinned site tile to work I'm encountering some rather strange behavior.</p>
  <p>First of all, are application tile images cached aggressively? It seems that once a site was pinned, changes to the relevant meta elements seem to be ignored. Un-pinning, clearing browser cache and doing a Windows clean-up of temp files/temp internet files has no effect. Even completely removing the meta elements, then trying to pin the site, still reuses the old ones. This makes debugging/testing rather difficult. Is there something I'm missing? How can the tile information be flushed?</p>
  <p>Secondly, it seems that the specified <code>msapplication-TileColor</code> is not handled correctly - in the example below I'm using transparent PNG files for the icons themselves, setting a tile color</p>
  <pre class="lang-xml prettyprint-override"><code>&lt;meta name=&quot;application-name&quot; content=&quot;The Paciello Group (TPG)&quot;&gt; 
  &lt;meta name=&quot;msapplication-TileColor&quot; content=&quot;#1b75bc&quot;&gt; 
  &lt;meta name=&quot;msapplication-TileImage&quot; content=&quot;/images/tpg-white-trans-144.png&quot;&gt;
  &lt;meta name=&quot;msapplication-square70x70logo&quot; content=&quot;/images/tpg-white-trans-70.png&quot;&gt;
  &lt;meta name=&quot;msapplication-square150x150logo&quot; content=&quot;/images/tpg-white-trans-150.png&quot;&gt;
  &lt;meta name=&quot;msapplication-square310x310logo&quot; content=&quot;/images/tpg-white-trans-310.png&quot;&gt;
  </code></pre>
  <p>However, checking the color that's actually used, it seems to be closer to #2672EC than #1b75bc. Could this be because of some color profile issue? Could it be that color profile information in the PNG is affecting the rendering of the actual specific tile color?</p>
  <p><a href="https://i.stack.imgur.com/dcv97.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dcv97.png" alt="Although the tile color nominally matches the blue of the site, it's rendered differently" /></a></p>
  <p><a href="https://i.stack.imgur.com/kCtmo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kCtmo.png" alt="Same inaccurate color rendering on mobile" /></a></p>