fix issue 290

Author: galvisgilberto

plotly/plotly_offline_aux/plotlyoffline.m

@@ -60,9 +60,8 @@
                       '\n    });'], id, clean_jdata, clean_jlayout, ...
                       id, link_text);
 
-    plotly_script = sprintf(['\n<div class="%s loading" style=', ...
-                              'color: rgb(50,50,50);"> </div>' ... 
-                              '\n<div id="%s" style="height: %s;',...
+    plotly_script = sprintf(['\n<div class="%s loading"',... 
+                             '\n<div id="%s" style="height: %s;',...
                              'width: %s;" class="plotly-graph-div">' ...
                              '</div> \n<script type="text/javascript">' ...
                              '%s \n</script>'], id, id, height, width, ...