column-rule-width: This value is used to set the width of the rule between the columns. The default value of this property-value is medium.
column-rule-style: This value is used to set the style of the rule between columns. The default value of this property-value is none.
column-rule-color: This value is used to set the color of the rule between columns. The default value of this property value is the color of the element.
initial: This value is used to set default value of this column-rule property.
inherit: This value tells the column-rule property to inherit the property from its parent.