column-rule

In multi-column layouts, the column-rule CSS property specifies a straight line, or "rule", to be drawn between each column.

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;

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.

Syntax

One, two, or three of the values listed below, in any order:

Values

<'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

Example 1

/* 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; }

Example 2

HTML content

<div id="col_rul"> 
  <p> column one </p>
  <p> column two </p>
  <p> column three </p>
</div>

CSS content

#col_rul { 
  padding: 0.3em;
  background: gold; 
  border: groove 2px gold;
  column-rule: inset 2px gold;
  column-count: 3;
}

Result

Specifications

Browser compatibility

[1]  Unprefixed as of Chrome 50.

[2] Unprefixed as of Gecko 52, with prefixed aliases still available.