ambientBaseLight property

double? ambientBaseLight
final

Opacity of the ambient base light when the button is pressed.

A pressed iOS 26 button brightens evenly across its whole surface for as long as the finger is down, on the same timescale as its inflation, and wherever the finger goes. This is that brightening — the whole pressed highlight, since glowRadius defaults to 0.

  • null (default): GlassDefaults.ambientBaseLight — the even lift of a pressed iOS 26 surface, measured at about +15 luma with the refraction still showing through — halved to GlassDefaults.ambientBaseLightDark in dark mode, where the same overlay reads as a flash
  • 0.0: No ambient base light
  • 0.6: Near-white, closer to a frosted highlight

An explicit value is honoured unchanged in both brightness modes.

Implementation

final double? ambientBaseLight;