gtk-color-selection-previous-alpha (selection)

selection -- a gtk-color-selection widget
alpha -- an integer between 0 and 65535

The function gtk-color-selection-previous-alpha returns the previous alpha value. The function (setf gtk-color-selection-previous-alpha) sets the previous alpha value.

This function should be called with some hesitations, as it might seem confusing to have that alpha change. The function gtk-color-selection-previous-alpha is deprecated since version 3.4 and should not be used in newly written code.