Chart Animation default color not appearing properly

[#1]

Hi,

I've created an animated chart with different background colors based on my selection. Everything is working properly, but when I run the animation without any selection, the bar color changing from grey to black. I've not given black color, where it is coming from?

Please fnd the attached sample file.

When I play the animation, I want everything should be in same (default) color. Also I don't want to change my default color in my bar.

How do i reslove it?

[kji]

It seems to be an issue with mixing colors between keyframes when the color expression evaluates to NULL.