Can't change the text color into black

The default text color is blue. I tried changing the CSS rule on text color into black but it didn't work.

I also tried this [ code below]: but either options below didin't work.

#nav

{

     color:black; [ tried also #000];

}

Can someone help me on how to change the default text color. How how to override that default color later on if I want some of text to be in a color that I want. I know that changing color should just simply assigning color using css but maybe dreamweaver has different way of doing it.

Thank you.