In color animation, the backColor1/2 attribute sets the object's background color for up to 16 tag or expression values (A to P). As the tag or expression value changes, the color of the object changes. Each value can have a different color. If the backBehavior attribute is solid, backColor1 is the same as backColor2. If the backBehavior attribute is blink, backColor2 can be set to a different color than backColor1.
The animateColor elements within an animations element contain this attribute.
FactoryTalk View equivalent: Background on the Animation Color tab