The Sketch colour picker in the second sample in More Examples has no alpha, yet displays an editable field for it. Furthermore, while a text box for the colour component has focus, dragging of the label below it changes the colour, but not the value in the text box. And I think for all "dialog-like" colour pickers the text box labels should actually be labels for the text box, that is, when clicked, they should put focus on the text box.
The Sketch colour picker in the second sample in More Examples has no alpha, yet displays an editable field for it. Furthermore, while a text box for the colour component has focus, dragging of the label below it changes the colour, but not the value in the text box. And I think for all "dialog-like" colour pickers the text box labels should actually be labels for the text box, that is, when clicked, they should put focus on the text box.