[idk1]

There is, they outline it in this video. It looks like there are three ways to turn it off: high contrast, reduced motion, and frostier glass. So it looks like there's just a way to have a full basic icon with just the icon and the outline and a white background.

https://developer.apple.com/videos/play/wwdc2025/219/

[xp84]

PSA: High Contrast mode on MacOS, incidentally, destroys theming on Microsoft Edge (I know, I’m a weirdo who uses Edge on Mac). I use theming to differentiate between several browser profiles. For months I thought Edge had decided they wanted the themes to be ultra lame and subtle, but it was my usage of that setting that broke it.

Besides that huge dealbreaker though, HC mode is amazing for people like me who think UIs should be clear, obvious, and functional first rather than “elegant” and pretty as the main priority.