Silver (#C0C0C0) is a light, nearly neutral neutral. Silver is a light metallic grey; on screens it is just grey, so add a subtle gradient for shine.
In RGB it is made of 192 red, 192 green and 192 blue. Its HSL hue angle is 0° with 0% saturation and 75% lightness, while its perceptual OKLCH lightness is 81%. For print, a starting CMYK mix is 0% cyan, 0% magenta, 0% yellow and 25% black.
As a text color on white, Silver has a contrast ratio of 1.82:1, which fails WCAG AA even for large text. On black it reaches 11.54:1 and passes AA for normal text. If you use Silver as a background, put black (or very dark) text on it. The APCA lightness contrast is Lc 70 for black text and Lc -38 for white text.
Its perceptual complement is #C0C0C0, close to silver. Colors that look most similar are khaki, dusty rose, tan. It looks fairly similar to people with red-green color blindness (ΔE 0), so its meaning mostly survives.