<p><b>@Zverik</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1779#discussion_r172752403">app/helpers/browse_helper.rb</a>:</p>
<pre style='color:#555'>> @@ -188,4 +190,16 @@ def telephone_link(_key, value)
 
     "tel:#{value_no_whitespace}"
   end
+
+  def colour_preview(key, value)
+    return nil unless (key =~ /^(|building:|ref:|roof:)colour$/ || key =~ /^(int_)?ref:colour(_(bg|tx))?$/) && !value.nil?
</pre>
<p>I agree that accepting <code>color</code> is a bit too much.</p>

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