Sets a value controlling how the color is applied. When undefined (the default), the theme controls the default fill mode. Can also be set to the following string values:

• "solid"
• "flat"
• "outline"

The "none" value is deprecated. Use custom CSS instead.

Example - sets the fillMode

<input id="otpinput" />
<script>
    $("#otpinput").kendoOTPInput({
        items: 3,
        fillMode: "outline"
    });
</script>