I am designing the statistics tools which will have it's Dashboard filled with multiple floating tiles showing accurate data as per user's need.
Apart from that we have primary and secondary menu,
Now, I need an advice about which type of treatment both the background can have in terms of colors so that they can stand out with their own importance, making sure that the dashboard tiles are highlighted more.'
Make sure it has to be only colors, not patterns or any shiny things needed. Just the color. A link will also help a lot.