Why does HarmonyOS 3.0 SMS mark turn black when it is read?

HarmonyOS system 3.0 SMS tag has been read in black, because dark mode is turned on. HarmonyOS system 32.0 can still vaguely see the shadow of Android. After all, it must be compatible with the entire Android ecosystem. In the process of compilation and execution, it is still compatible with Android software, while the native HarmonyOS system software takes up less space, has lower hardware requirements and has improved fluency. It turned out that Android software didn't control the rights of mobile phones enough, which led to many pop-up advertisements, automatic startup and unnecessary little red dot.