paper-menu-button theming ripple doesn't seem to work

[kenmoore]

Per the instructions in the documentation, I'm using this CSS to try to style the ripple of a paper-menu-button, but not getting any results:

  paper-menu-button::shadow .paper-menu-button-overlay-ink {
    background: blue;
  }

Also there's a typo in the docs: only a single colon before the shadow pseudo-element, should be two.

[morethanreal]

Are you using master of paper-menu-button or 0.4.2? The element API changed in master, and there's a new way to style the element. See the doc for paper-dropdown.