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

<select id="multiselect" multiple="multiple">
    <option>Item1</option>
    <option>Item2</option>
</select>
<script>
$("#multiselect").kendoMultiSelect({
  filter: "contains",
  fillMode: "flat"
});
</script>