HEX to OKLCH: #004F3B

Also known as: Tailwind emerald-900

#004F3B → oklch(0.380 0.076 168.7)

Values are shown at full precision, so converting back gives exactly #004f3b. 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. sRGB → linear

R: 0/255 = 0.00000 → 0.000000  (÷ 12.92)
G: 79/255 = 0.30980 → 0.078187  (((x + 0.055) / 1.055)^2.4)
B: 59/255 = 0.23137 → 0.043735  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.044184
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.057919
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.049579

3. cube root

l′ = ∛0.044184 = 0.353527
m′ = ∛0.057919 = 0.386908
s′ = ∛0.049579 = 0.367366

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.37996
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.07483
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.01494

5. Oklab → OKLCH

C = √(a² + b²) = 0.07631
H = atan2(b, a) = 168.711°
L = 0.37996

6. OKLCH

oklch(0.37996 0.07631 168.711)
rounded: oklch(0.380 0.076 168.7)

All formats

HEX: #004f3b
RGB: rgb(0 79 59)
RGB (legacy): rgb(0, 79, 59)
HSL: hsl(164.81 100.00% 15.49%) → hsl(165 100% 15%)
HWB: hwb(165 0% 69%)
OKLCH: oklch(0.380 0.076 168.7) · oklch(38.0% 0.076 168.7)
OKLab: oklab(0.380 -0.075 0.015)
Lab (D50): lab(29.08 -26.64 5.53)
LCH (D50): lch(29.08 27.21 168.28)
Display P3: color(display-p3 0.1225 0.3047 0.2361)
Linear sRGB: color(srgb-linear 0.0000 0.0782 0.0437)

Gamut: sRGB and Display P3

#004F3B is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.076 and Display P3 reaches 0.104; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #004f3b;
  color: rgb(0 79 59);
  color: hsl(165 100% 15%);
  color: oklch(0.380 0.076 168.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.380 0.076 168.7);
}
/* arbitrary values */
class="text-[#004f3b] bg-[oklch(0.380_0.076_168.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.1225 0.3047 0.2361); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #004f3b 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

#1B604B · oklch(0.440 0.076 168.7) · ΔL +0.06
#003F2C · oklch(0.320 0.076 168.7) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?