As the article points out, the more of the original color scheme that has survived, the better the reconstructions look.

Example: https://www.dailyartmagazine.com/wp-content/uploads/2022/09/...

The author suggests that this minimizes the opportunity for mischief, but tbqh it's likely that the ancients were simply much better artists than the people carrying out these reconstructions today.

I'd love to see a modern artist attempt one of these reconstructions using original materials but with greater artistic freedom.