In multi-column layouts, the column-rule CSS property specifies a straight line, or "rule", to be drawn between each column. It is a convenient shorthand to avoid setting each of the individual column-rule-* properties separately : column-rule-width, column-rule-style and column-rule-color.

  • Initial value the concatenation of the initial values of its longhand properties:
    • column-rule-width: medium
    • column-rule-style: none
    • column-rule-color: currentColor
  • Applies to multicol elements
  • Inherited no
  • Media visual
  • Computed value as each of the properties of the shorthand:
    • column-rule-color: If the value is translucent, the computed value will be the rgba() corresponding one. If it isn't, it will be the rgb() corresponding one. The transparent keyword maps to rgba(0,0,0,0).
    • column-rule-style: as specified
    • column-rule-width: an absolute length; 0 if the column rule style is none or hidden
  • Animatable as each of the properties of the shorthand:
    • column-rule-color: yes, as a color
    • column-rule-style: no
    • column-rule-width: yes, as a length
  • Canonical order order of appearance in the formal grammar of the values

Syntax

column-rule: dotted;
column-rule: solid blue;
column-rule: solid 8px;
column-rule: thick inset blue;

/* Global values */
column-rule: inherit;
column-rule: initial;
column-rule: unset;

Values

Accepts one, two or three values in any order:

<'column-rule-width'>
Is a <length> or one of the three keywords, thin, medium, or thick. See border-width for details.
<'column-rule-style'>
See border-style for possible values and details.
<'column-rule-color'>
Is a <color> value.

Formal syntax

<'column-rule-width'> || <'column-rule-style'> || <'column-rule-color'>

Examples

/* same as "medium dotted currentColor" */
p.foo { column-rule: dotted; }

/* same as "medium solid blue" */
p.bar { column-rule: solid blue; }

/* same as "8px solid currentColor" */
p.baz { column-rule: solid 8px; }

p.abc { column-rule: thick inset blue; }

Live Example

padding:0.3em; background:gold; border:groove 2px gold; column-rule: inset 2px gold; column-width:17em;

Specifications

Specification Status Comment
CSS Multi-column Layout Module
The definition of 'column-rule' in that specification.
Candidate Recommendation  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes)-webkit 3.5 (1.9.1)-moz 10 11.1 3.0 (522)-webkit
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? (Yes) ? ? ?

Document Tags and Contributors

Last updated by: fscholz,