Windows Vista How to change color of scroll bar

In Vista Home Premium 64 bit I have been changing display colors
Now I cannot find where I changed the color of the scroll bar. The default, I am pretty sure is not white.

But mine is white and I cannot tell the difference from the bar and the place behind on which it scrolls whatever that is called.

Thanks for help for such a simple problem

 

this is just a guess, but try right click on desktop then select personalize.

what ur looking for should be in themes.

there aren't many unless u start customizing

 

Your suggestion above is how I inadvertently changed the scrollbar color to white.

Now when I click on the scrollbar in the drop down list I cannot change the color. It is grayed out.

Thanks again