After updating my iPhone to iOS 26 beta, images displayed inside an in-app WebView (WKWebView) suddenly look almost black, as if a black overlay were sitting on top of them.
The same image files are delivered from the server without any problems.
I inspected the DOM and CSS in Safari’s remote debugger and confirmed that no extra overlay element or dark background layer is being injected.
The effect only appears inside the WebView on iOS 26 beta; the same page renders correctly on earlier iOS versions and on desktop browsers.
I would like to understand what change in iOS 26 beta could be causing this darkening effect.
Hello,
It's difficult to say exactly what the issue is. From the description it could an issue with gamma correction or a pre-multiplied alpha channel that Safari is now trying to use in the served images.
Given that this is beta it may be a bug so please report with the Feedback Assistant.
