Crimson — #DC143C

Crimson is #DC143C — rgb(220, 20, 60), hsl(348, 83.3%, 47.1%). Copy the HEX, RGB, HSL and OKLCH values, with shades and contrast ratios.

Contrast vs white
4.99:1
Contrast vs black
4.21:1

About crimson

A strong, slightly blue red originally made from the kermes insect. It is punchier than plain red and is a common error/alert colour.

The values above are computed from the sRGB hex #DC143C. The OKLCH form (oklch(57.1% 0.2219 20.09)) is worth noting: unlike HSL, its lightness matches how bright the colour actually looks, which makes building consistent shade scales far easier. To tweak this colour or convert one of your own, open the full colour converter, and check readable text pairings with the contrast figures shown above.

Accessibility note: text needs a contrast ratio of at least 4.5:1 for normal body copy under WCAG AA. Against white this colour scores 4.99:1 and against black 4.21:1 — use whichever clears the bar for the text you place on it.