HEX to OKLCH: #9D174D

Result

Values are shown at full precision, so converting back gives exactly #9d174d. 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. 1. sRGB → linear

   R: 157/255 = 0.61569 → 0.337164  (((x + 0.055) / 1.055)^2.4)
   G: 23/255 = 0.09020 → 0.008568  (((x + 0.055) / 1.055)^2.4)
   B: 77/255 = 0.30196 → 0.074214  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.147399
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.085249
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.078939

3. 3. cube root

   l′ = ∛0.147399 = 0.528241
   m′ = ∛0.085249 = 0.440112
   s′ = ∛0.078939 = 0.428974

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.45870
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.16930
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.01129

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.16968
   H = atan2(b, a) = 3.815°
   L = 0.45870

6. 6. OKLCH

   oklch(0.45870 0.16968 3.815)
   rounded: oklch(0.459 0.170 3.8)

All formats

HEX

#9d174d

RGB

rgb(157 23 77)

RGB (legacy)

rgb(157, 23, 77)

HSL

hsl(335.82 74.44% 35.29%) → hsl(336 74% 35%)

HWB

hwb(336 9% 38%)

OKLCH

oklch(0.459 0.170 3.8) · oklch(45.9% 0.170 3.8)

OKLab

oklab(0.459 0.169 0.011)

Lab (D50)

lab(35.13 54.88 5.37)

LCH (D50)

lch(35.13 55.15 5.59)

Display P3

color(display-p3 0.5646 0.1494 0.3014)

Linear sRGB

color(srgb-linear 0.3372 0.0086 0.0742)

Gamut: sRGB and Display P3

#9D174D is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.185 and Display P3 reaches 0.208; this color uses 92% of the sRGB chroma available.

CSS snippets

.element {
  color: #9d174d;
  color: rgb(157 23 77);
  color: hsl(336 74% 35%);
  color: oklch(0.459 0.170 3.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.459 0.170 3.8);
}
/* arbitrary values */
class="text-[#9d174d] bg-[oklch(0.459_0.170_3.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.5646 0.1494 0.3014); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #9d174d calc(l - 0.1) c h); }

Nearby colors

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

• pink-800#A3004C
• v3 rose-800#9F1239
• rose-800#A50036
• rose-900#8B0836
• pink-900#861043
• v3 rose-900#881337
• v3 pink-900#831843
• brown#A52A2A

Lighter and darker, same hue and chroma

• #B22F5E · oklch(0.519 0.170 3.8) · ΔL +0.06
• #89003D · oklch(0.399 0.170 3.8) · ΔL −0.06

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