How to make disappear overflowY & borders when using SwatchesPicker
Hello,

I am looking for a solution in order to remove the css properties `overflow-y` and `border` but also `box-shadow` from SwatchesPicker but I cannot find a way to do this. 
Below what I am always getting:
![spectacle s23123](https://cloud.githubusercontent.com/assets/9439390/12956289/9b4910fe-d027-11e5-9aa1-44611a937e9c.png)

Is there a way to do it through props? Do I have to implement a custom color picker? 

Anyway, thanks a bunch for this awesome component!
