Galileo once found a strange phenomenon in astronomical observation: Venus seen by naked eye is bigger than Jupiter, but what he saw in telescope is the opposite. Later physicist von Helmholtz discovered that this is because Venus is very bright, so it looks bigger in a dark background. He called this phenomenon "irradiation illusion". "White fat and black thin" is indeed true in the dark background.

Part of the reason for the radiation illusion is that the light scattering in the eye enlarges the imaging area of the bright area on the retina. For example, the French flag: The original French flag was composed of blue, white and red. Later, it was found that the white in the middle was brighter than the colors on both sides, which made people have an illusion that the red bands on both sides always seemed to have no blue bandwidth. Later, in order to overcome this illusion, the red band was widened and the blue band was narrowed until people looked very natural and symmetrical, which became today's proportion. The ratio of tricolor flag is 30:33:37, which has been used ever since.

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Black shrinks and white swells, which is the golden rule of dressing. Many people dress according to this sentence. Dark clothes, especially black, do have a slimming effect. However, the whole body black not only does not have the effect of slimming, but appears gloomy and dull, especially in winter, which inadvertently increases the sense of heaviness and naturally does not look good when worn. So it's wrong to be black all over.

How to wear it correctly: Most girls have thick legs after work, so they choose black for bottoms and try to choose other colors for tops. You can choose the same color system, which is neither boring nor slim, but it is a test of wearing skills.

References:

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References:

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