CSS Reference

"border" - css property (v. css 1)

  • The 'border' property is a shorthand property for setting the same width, color and style on all four borders of an element.
  • To set values for each individual border you must look at the properties: 'border-top' , 'border-bottom' , 'border-left' and 'border-right'
  • Initial value: Not defined for shorthand properties
  • The property is not inherited
  • HTML usage: all elements
  • Browsers that support the border - property :
    Internet Explorer Mozilla Firefox Opera Google Chrome Apple Safari

Possible width values:

Values Comments CSS
thin, medium or thick The width of the keyword values are UA dependent, but the following holds: 'thin' <= 'medium' <= 'thick'. 1
length With this you specify a value with a unit identifier. 1
inherit Will inherit the value from parent specification. This property value is new with CSS 2. 2

Possible unit identifier:

unit identifier Comments CSS
em The relative unit 'em' is relative to the font size of the element itself. 1
ex The relative unit 'ex' is relative to the font size of the element itself. 1
px Pixels, relative to the viewing device 1
in inches -> 1 inch is equal to 2.54 centimeters. 1
cm centimeters. 1
mm millimeters. 1
pt points -> the points used by CSS2 are equal to 1/72th of an inch. 1
pc picas -> 1 pica is equal to 12 points. 1

Possible color values:

values Comments CSS
Color name HTML and CSS color specification defines 147 color names (17 standard colors plus 130 more). You find all the named color through the drop-down selection in the color picker below. 1
rgb(r,g,b) Integer values representing a color in the form of Red Green and Blue components each with a value between 0 - 255. (rgb(255,0,0) gives a red color) 1
#value A hexadecimal value representing a color in the form of Red Green and Blue components each with a value between 00 - FF. 1
inherit Will inherit the value from parent specification. This property value is new with CSS 2. 2
Color picker:

Selected Color:

Hex:
Red:
Green:
Blue:
Hue:
Saturation:
Value:
Harmonious colors:

Possible border styles values:

border style Comments CSS
none No border is drawn (regardless of the 'border-width' value). 1
dotted The border is a dotted line drawn on top of the background of the element. 1
dashed The border is a dashed line drawn on top of the background of the element. 1
solid The border is a solid line. 1
double The border is a double line drawn on top of the background of the element. The sum of the two single lines and the space between equals the 'border-width' value. 1
groove A 3D groove is drawn in colors based on the <color> value. 1
ridge A 3D ridge is drawn in colors based on the <color> value. 1
inset A 3D inset is drawn in colors based on the <color> value. 1
outset A 3D outset is drawn in colors based on the <color> value. 1
inherit Will inherit the value from parent specification. This property value is new with CSS 2. 2

Property "border" example:

<!DOCTYPE HTML >
<html  >
  <head>
    <title>Test</title>
    <style type="text/css">
      .presentation {
        border: #26B1B1 solid 10px ;
        width: 400px;
         }
     </style>
  </head>
  <body>
    <div class='presentation'  >The Inherit value is inherited from
          the parent specification. This property value is new
          with CSS 2.
    </div>
  </body>
</html>

Another property "border" example:

<!DOCTYPE HTML >
<html  >
  <head>
    <title>Test</title>
    <style type="text/css">
      .groove {border:  grey groove 12px;
        width: 400px;}
      .ridge {border:  green ridge 12px;
        width: 400px;}
      .inset {border:  blue inset 12px;
        width: 400px;}
      .outset {border:  black outset 12px;
        width: 400px;}
     </style>
  </head>
  <body>
    border-style "groove":<br>
    <div class='groove'  >A 3D groove is drawn in colors
      based on the color value.
    </div>
    border-style "ridge":<br>
    <div class='ridge'  >A 3D ridge is drawn in colors
      based on the color value.
    </div>
    border-style "inset":<br>
    <div class='inset'  >A 3D inset is drawn in colors
      based on the color value.
    </div>
    border-style "outset":<br>
    <div class='outset'  >A 3D outset is drawn in colors
      based on the color value.
    </div>
  </body>
</html>

Javascript access:

// To SET values ([o] is the target object)
[o].style.border="border values"
// Browsers can not return any trustworthy value from this property.
// To GET values, look at the details for each edge of the border.
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