how do i change background color for scroll bar

how do i change background color for scroll bar . If I don’t use a scroll bar and the grid is smaller than the div that contains the grid, then a little blue square remains between the header and the div margin . i need to change it’s color to. How do I do that


There is no crossbrowser way to assign custom styles to scrollbar ( it may be done only for IE )
Please provide any sample or just an image there mentioned visual glitch can be detected.