Update site.html.eco

server/documents/globals/site.html.eco

@@ -135,7 +135,7 @@ themes      : ['Default', 'Material']
   <div class="colors example">
     <h4 class="ui header">Colors</h4>
     <p>A site can define a set of hex values for common named colors</p>
-    <div class="ui four column stackable padded grid">
+    <div class="ui five column stackable padded grid">
       <div class="red column">Red</div>
       <div class="orange column">Orange</div>
       <div class="yellow column">Yellow</div>
@@ -148,6 +148,7 @@ themes      : ['Default', 'Material']
       <div class="pink column">Pink</div>
       <div class="brown column">Brown</div>
       <div class="grey column">Grey</div>
+      <div class="black column">Black</div>
     </div>
   </div>