border-color sets the color of the border.

 
<!DOCTYPE HTML> 
<html> 
    <head> 
        <title>Example</title> 
        <style type="text/css"> 
        p { 
            border-width: 5px; 
            border-style: solid; 
            border-color: black; 
        } 
        </style> 
    </head> 
    <body> 
        <p> 
            HyperText Markup Language (HTML) is the main markup language for 
            displaying web pages and other information that can be displayed 
            in a web browser(From From Wikipedia, the free encyclopedia).
        </p> 
    </body> 
</html>
Click to view the demo

See how to use the CSS color.

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