What ObjectStateListener.colorChangedMulti receives: the objects whose colour changed, per colour
Alterations of the objects' own colour: a transparency from 0 to 1, a number or a numeric string (0: the own colour, opaque, as ColorChangeMap.resetQid gives) → the objects that got it
Fixed colours: the colour → the objects that got it
What ObjectStateListener.colorChangedMulti receives: the objects whose colour changed, per colour