border: 1px solid rgb(0, 0, 0);

   
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
                      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en'>
    <head>
        <title>background-color</title>
<style type='text/css'>
body {
    background-color: pink;
    line-height: 32px;
}
span {
    border: 1px solid rgb(0, 0, 0);
}
span#keyword {
    background-color: yellow;
}
span#rgb {
    background-color: rgb(200, 0, 0);
    color: #fff;
}
span#hexadecimal {
    background-color: #000000;
    color: #ffffff;
}
span#short-hex {
    background-color: #fff;
    color: #000;
}
span#transparent {
    background-color: transparent;
}
</style>
    </head>
    <body>
        <p>
            <span id='keyword'>color keyword</span>,
            <span id='rgb'>RGB value</span>, 
            <span id='hexadecimal'>hexadecimal value</span> 
            <span id='short-hex'>short hexadecimal</span> 
            <span id='transparent'>transparent</span>
        </p>
    </body>
</html>

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1.	'border' Example
2.	border width, border style shorthand four values
3.	border width, border style shorthand one value
4.	border width, border style shorthand, three values
5.	border width, border style shorthand two values
6.	border: thin solid rgb(0, 0, 0)
7.	border: 1em solid black
8.	border: medium solid black
9.	border: thin solid black
10.	border: 1px solid crimson;
11.	border: 1px solid gold;
12.	border: 1px solid rgb(200, 200, 200);
13.	Style sheet for border properties
14.	border-color: red green purple blue; border-width: thin medium thick .25cm;
15.	border overwrite
16.	Use border-bottom to draw line
17.	Dashed border
18.	border: 1px dashed #8a795d;
19.	Using image for border
20.	Border page border
21.	border: 1px solid green;
22.	When no border-color is specified, the border color is the value of the color property.
23.	border-style: solid dashed double inset;
24.	Border with default color
25.	border sets the size, pattern, and color of the border surrounding the padding.
26.	border: thick solid black
27.	Border shortcut setting
28.	border shortcut property takes three space-delimited values that represent the border's width, style, and color.
29.	border: 40px double black; creates a black, 40-pixel, double-line border.
30.	Border with specific setting for four directions
31.	This paragraph has a 1 pixel thick, solid black border around it.
32.	Border direction
33.	Set border to '3px dotted #33333;'
34.	Body border: 50px #666 ridge
35.	Add border for different columns together
36.	Combined style
37.	border:none is the default.
38.	Border's width cannot be negative because they are inside the margin.
39.	Use nested border
40.	border property, can be used to specify border-width, border-style, and border-color for all four sides at once.
41.	Border cascade

border: 1px solid rgb(0, 0, 0); : border « CSS « HTML / CSS

Related examples in the same category