HEX to OKLCH: #778899

Result

Values are shown at full precision, so converting back gives exactly #778899. 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: 119/255 = 0.46667 → 0.184475  (((x + 0.055) / 1.055)^2.4)
   G: 136/255 = 0.53333 → 0.246201  (((x + 0.055) / 1.055)^2.4)
   B: 153/255 = 0.60000 → 0.318547  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.224478
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.240891
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.286327

3. 3. cube root

   l′ = ∛0.224478 = 0.607750
   m′ = ∛0.240891 = 0.622215
   s′ = ∛0.286327 = 0.659104

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.61902
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.01199
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.03021

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.03250
   H = atan2(b, a) = 248.351°
   L = 0.61902

6. 6. OKLCH

   oklch(0.61902 0.03250 248.351)
   rounded: oklch(0.619 0.033 248.4)

All formats

HEX

#778899

RGB

rgb(119 136 153)

RGB (legacy)

rgb(119, 136, 153)

HSL

hsl(210.00 14.29% 53.33%) → hsl(210 14% 53%)

HWB

hwb(210 47% 40%)

OKLCH

oklch(0.619 0.033 248.4) · oklch(61.9% 0.033 248.4)

OKLab

oklab(0.619 -0.012 -0.030)

Lab (D50)

lab(55.77 -3.45 -11.29)

LCH (D50)

lch(55.77 11.80 253.02)

Display P3

color(display-p3 0.4794 0.5313 0.5935)

Linear sRGB

color(srgb-linear 0.1845 0.2462 0.3185)

Gamut: sRGB and Display P3

#778899 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.168 and Display P3 reaches 0.217; this color uses 19% of the sRGB chroma available.

CSS snippets

.element {
  color: #778899;
  color: rgb(119 136 153);
  color: hsl(210 14% 53%);
  color: oklch(0.619 0.033 248.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.619 0.033 248.4);
}
/* arbitrary values */
class="text-[#778899] bg-[oklch(0.619_0.033_248.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.4794 0.5313 0.5935); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #778899 calc(l - 0.1) c h); }

Nearby colors

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

• slategray#708090
• gray#808080
• mist-500#67787C
• cadetblue#5F9EA0
• v3 slate-500#64748B
• slate-500#62748E
• gray-500#6A7282
• v3 gray-500#6B7280

Lighter and darker, same hue and chroma

• #899AAC · oklch(0.679 0.033 248.4) · ΔL +0.06
• #667687 · oklch(0.559 0.033 248.4) · ΔL −0.06

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