kground-color: #4285f4;
    }

To change the checked ink color:

    paper-toggle-button::shadow [checked] .toggle-ink {
      color: #4285f4;
    }

To change the toggle bar and toggle button colors separately:

    paper-toggle-button::shadow .toggle-bar {
      background-color: #5677fc;
    }

    paper-toggle-button::shadow .toggle-button {
      background-color: #9c27b0;
    }

@group Paper Elements
@element paper-toggle-button
@homepage github.io
-->

<link rel="import" href="../paper-radio-button/p