Hi,
You can only pass CSS class name to overrideStyle. You can not pass inline styles. So for example, you would use it like this:
Code: CSS
.blue_text
{
color: blue;
}
Code: JavaScript
gridItem.getCell(7).overrideStyle("blue_text");
Note here "blue_text" is a CSS class name that you have already defined in your page.
Thanks!