Hi!

This may be the stupidest question, but i was playing around with my new blackberry, and i somehow managed to change the colour scheme so that now everything is reversed, however I want to change it back and I have noo idea how.. anyone have any idea what I am talking about and how to change it??

It would be greatly appreciated thanks

Try this, hopefully it is what you are looking for:
Options>Advanced options>Accessibility>Colour Contrast> set to Normal> Save