Regarding the issue of coloring

Who can tell me why the color on my phone version Nomad is darker than the color on the color dial? For example, I clearly set the color dial to white and pressed all colors or forced all colors, but when viewed from outside, it looks like gray? I have tried this many times, and my phone model is RMX3571

Is your lighting PBR (Lit) ?

A white object will reflect its environment…
This is a pure white sphere

It’s the environment that tints it with yellow