column-rule-color

Sets the color of the vertical line (rule) drawn between the columns of a multi-column layout.

It is documented as part of the CSS Multi-column Layout specification.

/* Usage Example */
.content {
  column-count: 3;
  column-rule-style: solid;
  /* Sets the color of the vertical separator line */
  column-rule-color: #cbd5e1;
}

/* Global values */
column-rule-color: inherit;
column-rule-color: initial;
column-rule-color: revert;
column-rule-color: revert-layer;
column-rule-color: unset;
Widely available Since 2017 96% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2017.

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