How to add border/shadow in color picker?
I'm using TwitterPicker now. I added white color to colors array.
Since this white color does not have any border color or box-shadow, users might not notice there's white color.

<img width="288" alt="スクリーンショット 2021-05-06 17 36 27" src="https://user-images.githubusercontent.com/10560950/117267785-99472680-ae91-11eb-850f-67911e58ce19.png">

How do I add styling to it??