Ionic range color theme is not working

Applying colour theme to range input is not working . Do I need to add custom CSS in addition to below?

<div class="item range">
  <i class="icon ion-volume-low"></i>
  <input type="range" name="volume">
  <i class="icon ion-volume-high"></i>

Below are the setup details,

$ ionic info

Your system information:

Cordova CLI: 6.1.1
Gulp version:  CLI version 3.9.1
Gulp local:
Ionic Framework Version: 1.3.0
Ionic CLI Version: 2.0.0-beta.32
Ionic App Lib Version: 2.0.0-beta.18
Node Version: v4.2.2