Adobe officially killed Flash Player in 2020, but Flash Professional (the authoring tool) lives on. Enthusiasts have kept it alive via virtual machines and standalone projectors. As of 2025, the demand for a native dark mode has led to open-source projects like (an emulator), but for now, manual modification remains king.
However, you can simulate a darker working environment by customizing specific workspace elements: 1. Change the Stage Background Color adobe flash cs6 dark mode