Colours mismatched

[C10ne]

Hi,
The colours in lottie file we use in animation are different then in exported mp4 file. Here is a picture for reference:

On left is original animation, uploaded to lottie files, and to the right exported file.

Any idea how that can be matched?

I've tried setting the background, also changing the default background in html, but the animation itself has a background, which is incorrectly rendered.