HEX to OKLCH: #007A55

Also known as: Tailwind emerald-700

#007A55 → oklch(0.513 0.110 163.6)

Values are shown at full precision, so converting back gives exactly #007a55. 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: 122/255 = 0.47843 → 0.194618  (((x + 0.055) / 1.055)^2.4)
B: 85/255 = 0.33333 → 0.090842  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.109053
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.142232
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.112056

3. cube root

l′ = ∛0.109053 = 0.477763
m′ = ∛0.142232 = 0.521995
s′ = ∛0.112056 = 0.482109

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.51285
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.10546
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.03111

5. Oklab → OKLCH

C = √(a² + b²) = 0.10995
H = atan2(b, a) = 163.565°
L = 0.51285

6. OKLCH

oklch(0.51285 0.10995 163.565)
rounded: oklch(0.513 0.110 163.6)

All formats

HEX: #007a55
RGB: rgb(0 122 85)
RGB (legacy): rgb(0, 122, 85)
HSL: hsl(161.80 100.00% 23.92%) → hsl(162 100% 24%)
HWB: hwb(162 0% 52%)
OKLCH: oklch(0.513 0.110 163.6) · oklch(51.3% 0.110 163.6)
OKLab: oklab(0.513 -0.105 0.031)
Lab (D50): lab(44.95 -37.62 11.78)
LCH (D50): lch(44.95 39.42 162.62)
Display P3: color(display-p3 0.2046 0.4710 0.3438)
Linear sRGB: color(srgb-linear 0.0000 0.1946 0.0908)

Gamut: sRGB and Display P3

#007A55 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.110 and Display P3 reaches 0.151; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #007a55;
  color: rgb(0 122 85);
  color: hsl(162 100% 24%);
  color: oklch(0.513 0.110 163.6);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.513 0.110 163.6);
}
/* arbitrary values */
class="text-[#007a55] bg-[oklch(0.513_0.110_163.6)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2046 0.4710 0.3438); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #007a55 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

#258C66 · oklch(0.573 0.110 163.6) · ΔL +0.06
#006845 · oklch(0.453 0.110 163.6) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?