I just created my own ambilight with Hyperion: https://hyperion-project.org
I found a NodeJS lib which you can use to create all sorts of effects. Though I’d be fun if you can control it with Pimatic. Another use could be to turn off the ambilight when the TV is off or just use it as a mood light in your house.
I’m wondering if there are other people here using Hyperion to determine how much effort I should put in the plugin