The border-inline-start CSS property is a shorthand property for setting the individual logical inline-start border property values in a single place in the style sheet.

Constituent properties

This property is a shorthand for the following CSS properties:


border-inline-start: 1px;
border-inline-start: 2px dotted;
border-inline-start: medium dashed green;

The physical border to which border-inline-start maps depends on the element's writing mode, directionality, and text orientation. It corresponds to the border-top, border-right, border-bottom, or border-left property depending on the values defined for writing-mode, direction, and text-orientation.

Related properties are border-block-start, border-block-end, and border-inline-end, which define the other borders of the element.


The border-inline-start is specified with one or more of the following, in any order:

The width of the border. See border-width.
The line style of the border. See border-style.
The color of the border. See color.

Formal definition

Initial valueas each of the properties of the shorthand:
Applies toall elements
Computed valueas each of the properties of the shorthand:
Animation typeas each of the properties of the shorthand:

Formal syntax

<'border-top-width'> || <'border-top-style'> || <color>

<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>

<rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )
<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )
<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )
<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )

<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>



  <p class="exampleText">Example text</p>


div {
  background-color: yellow;
  width: 120px;
  height: 120px;

.exampleText {
  writing-mode: vertical-rl;
  border-inline-start: 5px dashed blue;


Specification Status Comment
CSS Logical Properties and Values Level 1
The definition of 'border-inline-start' in that specification.
Editor's Draft Initial definition

Browser compatibility

BCD tables only load in the browser

See also