fillMode String(default: "solid")

Sets a value controlling how the color is applied. Can also be set to the following string values:

• "none"
• "solid"
• "flat"
• "outline"

Example - sets the fillMode

<input id="multicolumncombobox" />
<script>
  $("#multicolumncombobox").kendoMultiColumnComboBox({
    dataSource: [
      { Name: "Parent1", Id: 1 },
      { Name: "Parent2", Id: 2 }
    ],
    dataTextField: "Name",
    dataValueField: "Id",
    columns: [
      { field: "Name" },
      { field: "Id" }
    ],
    fillMode: "flat"
  });
</script>