#FFF circle color picker selected state on white background
If you use a CirclePicker color of #fff (white) and put it on a white background, the box shadow color is white and the 'selected'  circle that appears is also... white. This leaves you with basically an invisible color picker.

I would propose that if one of the CirclePicker colors is #fff then make the box shadow color #000 by default and change the 'selected' circle that appears to additionally include a #000 colored border on it.

I know I can override this with CSS but I feel this shouldn't need to be overridden.

I would make a 'pull request' to offer these changes for you but I don't quite understand how pull requests work. I don't get why it's asking me to compare branches when all I wish to do is submit a single file.

**Edit** With that said, how exactly do I override the default CSS? I attempted to copy `react-color/lib/components/circle/circle.js` and `react-color/lib/components/circle/CircleSwatch` but I just get an error any time I click the color...?
<img width="1263" alt="screenshot 2018-08-24 at 07 06 57" src="https://user-images.githubusercontent.com/16267903/44567892-5342e680-a76c-11e8-9c62-bc90266aeb48.png">
