Robert is correct. If you want to be more specific with your colors, you can set each border's color individually, and create the inset/outset yourself.
For example, this:
Code:.outsetBorder{
border:1px outset red;
}
is the same as this:
Code:.outsetBorder{
border-top:1px solid #FFB2B2;
border-left:1px solid #FFB2B2;
border-right:1px solid #8D0000;
border-bottom:1px solid #8D0000;
}
So you are creating the same effect, but that way can control your colors specifically. This will also ensure the borders look the same in all browsers. I am not 100% sure that doing "1px outset red;" will render the same in all modern browsers or not. (I'd guess it will, but haven't tested it)