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

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

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

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