Flex 3 color picker no color value

I need "no color" value in flex 3/4 color picker component. Here are some options I've investigated:

1) External componet. Searched a lot but didn't managed to find a suitable one. There is a great color picker that meets my needs completely, but it is in action script 2 format. I need as3.

2) Enhance the existing built-in color picker component.

So here I need your help. Do you have any ideas how the built-in color picker component can be enhanced in ord开发者_StackOverflow中文版er to support "no color" value?

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We had this same problem. We ended up just putting a "clear button" to the right of the color picker. Not ideal.