The SherlockCube is a color picker dialog. It provides an intuitive way of color selection by sampling color from a RGB cube. The surface levels of the cube are controllable by adjusting values of the color channels. Therefore, a unique color cube can be formed with the desired surface levels and allow for easy color selection.
You can download and install SherlockCube from following link: http://www.sherlockforms.net/sherlockcube/publish.htm