Silver belongs to a kind of compound color, is the color of metallic luster, gray is the color of black and white, silver brightness is high, and gray darkness is high, the total silver is brighter than gray.
And gray does not have the texture characteristics, but the name code of the color, while silver has the gloss that gray does not have.
That is, when light hits the color, it can produce strong reflection, which will give people the feeling of silver. If it cannot produce strong reflection, it is still a relatively uniform color, which is closer to gray.