Nero

In the Register's classification, #252525 ("Nero") belongs to the Red Color Family, featuring Desaturated and Dark brightness. The mix behind it: rgb(37, 37, 37) — 14.5% red, 14.5% green, 14.5% blue; the print equivalent is CMYK 0 / 0 / 0 / 85. New to color codes? See our guide to RGB color codes.

The color #252525 reads as a softly muted neutral grey and stays on the darker end of the scale. Designers typically reach for tones like this for dark UI themes, backgrounds and dramatic accents. In The Official Register of Color Names it is almost identical to Plock Gray (#232224). Slightly further away sit Raisin Black (#242124) and Black Chestnut Oak (#252321).

Technically, #252525 is a perfectly balanced RGB mix — red, green and blue all sit at 37, which is what makes it a true neutral. Accessibility-wise, white text works best on #252525: 15.3:1 contrast (passing WCAG AAA) versus 1.4:1 for black. On paper it relies strongly on black ink (K:85), so proof dark layouts before a large print run. The name "Nero" is officially recorded for this exact shade in The Official Register of Color Names.