RGB to HEX: #EF4444

Also known as: Tailwind v3 red-500

rgb(239 68 68) → #EF4444

Values are shown at full precision, so converting back gives exactly #ef4444. The rounded form is what you normally paste into CSS.

Step-by-step math

Every number below is computed from the input, nothing is looked up.

1. base 10 → base 16

R = 239 = 14×16 + 15 → EF
G = 68 = 4×16 + 4 → 44
B = 68 = 4×16 + 4 → 44

2. pairs → HEX
```
EF 44 44 → #EF4444
```

All formats

HEX: #ef4444
RGB: rgb(239 68 68)
RGB (legacy): rgb(239, 68, 68)
HSL: hsl(0.00 84.24% 60.20%) → hsl(0 84% 60%)
HWB: hwb(0 27% 6%)
OKLCH: oklch(0.637 0.208 25.3) · oklch(63.7% 0.208 25.3)
OKLab: oklab(0.637 0.188 0.089)
Lab (D50): lab(55.79 65.62 40.80)
LCH (D50): lch(55.79 77.27 31.87)
Display P3: color(display-p3 0.8651 0.3219 0.2966)
Linear sRGB: color(srgb-linear 0.8632 0.0578 0.0578)

Gamut: sRGB and Display P3

#EF4444 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.249 and Display P3 reaches 0.291; this color uses 84% of the sRGB chroma available.

CSS snippets

.element {
  color: #ef4444;
  color: rgb(239 68 68);
  color: hsl(0 84% 60%);
  color: oklch(0.637 0.208 25.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.637 0.208 25.3);
}
/* arbitrary values */
class="text-[#ef4444] bg-[oklch(0.637_0.208_25.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.8651 0.3219 0.2966); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #ef4444 calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

Lighter and darker, same hue and chroma

#FF5A56 · oklch(0.697 0.208 25.3) · ΔL +0.06
#D92C32 · oklch(0.577 0.208 25.3) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

All converters →

Guides: What is OKLCH?