Customize the color of an indeterminate progress bar

To keep your users aware of the fact that there's asynchronous actions in progress, the indeterminate progress bar is a common practice. One thing I've noticed is that when you add a ProgressBar element to a page in your Windows 8 page, the color of the indeterminate state is static meaning that there's no public property that you can use to set a specific color. One approach might be to retemplate the entire control, but it's a bit drastic when there's actually an easier approach.

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