We got some feedback that users wanted to better match the flamegraph coloring to their theme. I tried some scheme to automatically pick an existing color from the theme, but didn't have good results. I think in part because we don't have a singular "flame"-like color, for example I tried using the border color of input validation errors, but on some themes this didn't work very well.

Kai suggested adding a new color for this that themes should customize. I'm not sure what it should be named, maybe just a "vibrant" color?