Open the color eyedropper
Hey there 👋! 

I would be awesome to open the color picker via the API. I'm not really interested in the full color picker with the gradient but only about the eyedropper on the document itself as shown in the image.

![image](https://user-images.githubusercontent.com/8393332/62051530-df2e7f80-b213-11e9-8254-0e95dfe264db.png)

Will the feature be available or I can do it with the current api?

Thanks for your work!