Customizing a Flex TextInput control’s error color

The following example shows how you can customize a Flex TextInput control’s error color and error string using the errorColor style and errorString property.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:ApplicationControlBar dock="true">
        <mx:Label text="errorColor:" />
        <mx:ColorPicker id="colorPicker" />
    </mx:ApplicationControlBar>

    <mx:Form>
        <mx:FormItem label="text:" required="true">
            <mx:TextInput id="textInput"
                    errorColor="{colorPicker.selectedColor}"
                    errorString="Custom error color" />
        </mx:FormItem>
        <mx:FormItem>
            <mx:Button />
        </mx:FormItem>
    </mx:Form>

</mx:Application>