The idea is this : To add a color preview box to the Specific Color Selector docker (Like this) :
I feel that having a preview localized close to the sliders would make it easier to visualize the color that is being chosen. It also makes making adjustments easier, because the artist’s eyes don’t need to constantly travel back and forth to another docker to check the color.
As it is, the Specific Color Selector feels hard to use as a stand-alone docker, like a supplement to the Advanced Color Selector rather than an alternative.
So much so that I made the foreground colour panel (fgc) for pigmento so you can have it up to display the currently selected colour closer to your using krita docker. It is resizable.