Change the roadmap selected default color

Hi all experts,

I am a beginner in web dynpro and now i am facing the changing the selected color in the roadmap UI element.

As is:

When the step is selected in the roadmap, it is changed to the orange color (think it is default color).

To be:

When the step is selected in the roadmap, we would like to change it to our desired color such as red or green, etc.

Please feel free to guide me if you have any?

Best regards,

Toke Kit.