Thank you for the feedback @wizard_hu
Having just taken screenshots using the screensnap tool, I can confirm that the colour is not really changing on the actual code. It is related to the...

Thank you for the feedback.
Brightness is set the same on all 3 handsets but they all display different colours. Battery levels are also the same.

Luminosity settings? There are no such settings on the Lumia800 handsets I have or at least not in "Settings =>Luminosity". Could you send a screenshot.

Congrats Somnathbanik ;-) Keep up the good work! You rock dude!