Why do some people say this skirt is blue and black, while others say it is platinum? Why is this happening? I didn't see white anyway. . . )

Because the different viewing angles are related to the reflection of light.

In other words, tell the camera's white balance system that the light color part of the skirt is white, and then the camera will automatically adjust other colors, which is produced. I tried blue and black in the same way. Because black is too dark to be adjusted, I have increased the brightness (especially the shadow brightness), so after adjusting the white balance, the black part will indeed be close to the color of the dark part of the skirt, and the more brightness is raised, the closer it will be, and finally the difference between blue and black will be achieved.

Simply put, if your eyes feel that the camera has warmed up the picture, then you may think that the picture should be bluer, so the light-colored part should change from light blue to blue, and the dark part should change from brown (composed of red, green and a little blue) to gray-black (red, green and blue are equal).