If you have created a tonal database (Tone DB) of colours you can view the tonal breakdown of colour chips in the Gamut Window.

In ColourSys, go to the Window Menu and select Gamut Window. Click Options and from the window that opens make sure the ‘Show Tonal Breakdown’ option is ticked.

Go to File Menu > Open to open a tonal database. When you click on a colour chip in the Tone DB you will now see a tonal breakdown inside the Gamut Window.