[Q] How to change colour of navigation arrow

[kc1]

It seems both the stock HTC navigation and Google Navigation overlay the blue route with a white arrow - i find this very difficult to see clearly when I'm using either.

Does anyone know how to change the colour of the arrow in either application?

Thanks

 

[kc1]

Not possible or nobody knows how to do it?

Sent from my HTC Desire S using XDA App