How to set transparency for iPhone Safari browser

I have a problem here, Entity transparency in Apple system can not be displayed, how to solve?

Cesium.Color.fromCssColorString(option.color).withAlpha(0.55)

Android is normal, Apple is not normal
Apple does not support

.withAlpha(0.55)

how to solve?

Hi there,

Could you please follow up with more details in iphone Safari transparency · Issue #11599 · CesiumGS/cesium · GitHub?

Thanks!