This dialog has two parts.
On the left, a pick list of the schemes that are currently available along with a list of colors that are in that scheme. The color description will be appended with (Calibrated) if the color has been modified by the current invocation of this dialog.
On the right, is the name and description of the currently selected color, this will be appended with (Modified) if the color has been modified, a preview of the color, and the current RGB values for the color.
Also shown is a button. This will reset the currently selected color to the value it had when the dialog was first invoked.
Pressing the button will commit all of the changed colors.
Pressing the button will restore all the changed colors back to their original values.