There are several reasons to animate an object's color or text. Two very common applications are to:

Show that a switch is on or off

Provide clear warning if a value is in an alarm state

6.1	Animate the color/expression of an object.
6.2	Animate the visibility of an object.
6.3	Animate an object alarm state.
6.4	Color index for animation.

More information

Runtime movement and animation

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