HEX to OKLCH: #4A5565

Also known as: Tailwind gray-600

#4A5565 → oklch(0.446 0.030 257.7)

Values are shown at full precision, so converting back gives exactly #4a5565. 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: 74/255 = 0.29020 → 0.068478  (((x + 0.055) / 1.055)^2.4)
G: 85/255 = 0.33333 → 0.090842  (((x + 0.055) / 1.055)^2.4)
B: 101/255 = 0.39608 → 0.130136  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.083645
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.090323
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.113622

3. cube root

l′ = ∛0.083645 = 0.437333
m′ = ∛0.090323 = 0.448676
s′ = ∛0.113622 = 0.484344

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.44614
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.00636
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.02914

5. Oklab → OKLCH

C = √(a² + b²) = 0.02982
H = atan2(b, a) = 257.680°
L = 0.44614

6. OKLCH

oklch(0.44614 0.02982 257.680)
rounded: oklch(0.446 0.030 257.7)

All formats

HEX: #4a5565
RGB: rgb(74 85 101)
RGB (legacy): rgb(74, 85, 101)
HSL: hsl(215.56 15.43% 34.31%) → hsl(216 15% 34%)
HWB: hwb(216 29% 60%)
OKLCH: oklch(0.446 0.030 257.7) · oklch(44.6% 0.030 257.7)
OKLab: oklab(0.446 -0.006 -0.029)
Lab (D50): lab(35.64 -1.43 -10.82)
LCH (D50): lch(35.64 10.91 262.47)
Display P3: color(display-p3 0.2984 0.3320 0.3904)
Linear sRGB: color(srgb-linear 0.0685 0.0908 0.1301)

Gamut: sRGB and Display P3

#4A5565 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.163 and Display P3 reaches 0.207; this color uses 18% of the sRGB chroma available.

CSS snippets

.element {
  color: #4a5565;
  color: rgb(74 85 101);
  color: hsl(216 15% 34%);
  color: oklch(0.446 0.030 257.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.446 0.030 257.7);
}
/* arbitrary values */
class="text-[#4a5565] bg-[oklch(0.446_0.030_257.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2984 0.3320 0.3904); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #4a5565 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

#5A6676 · oklch(0.506 0.030 257.7) · ΔL +0.06
#3A4554 · oklch(0.386 0.030 257.7) · ΔL −0.06

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