The column-rule-color CSS property lets you set the color of the rule drawn between columns in multi-column layouts.

[Webplatform](docs.webplatform.org/wiki/css/properties/column-rule-color "Webplatform")
[Mozilla docs](https://developer.mozilla.org/en-US/docs/Web/CSS/column-rule-color "Mozilla")
[Caniuse](http://caniuse.com/#feat=multicolumn "Caniuse")