OKLCH to HEX: #99A1AF

Also known as: Tailwind gray-400

oklch(0.70708 0.02236 261.749) → #99A1AF

Values are shown at full precision, so converting back gives exactly #99a1af. 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. input
```
oklch(0.70708 0.02236 261.749)
```

2. OKLCH → Oklab

a = C·cos H = -0.00321
b = C·sin H = -0.02213

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.701033
m′ = L − 0.1056·a − 0.0639·b = 0.708832
s′ = L − 0.0895·a − 1.2915·b = 0.735946

4. cube

l = 0.701033³ = 0.344520
m = 0.708832³ = 0.356147
s = 0.735946³ = 0.398600

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.318553
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.356405
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.428689

6. linear → sRGB, × 255

R = 0.60001 × 255 = 153.00 → 153
G = 0.63138 × 255 = 161.00 → 161
B = 0.68627 × 255 = 175.00 → 175

7. RGB → HEX
```
#99A1AF
```

All formats

HEX: #99a1af
RGB: rgb(153 161 175)
RGB (legacy): rgb(153, 161, 175)
HSL: hsl(218.18 12.09% 64.31%) → hsl(218 12% 64%)
HWB: hwb(218 60% 31%)
OKLCH: oklch(0.707 0.022 261.7) · oklch(70.7% 0.022 261.7)
OKLab: oklab(0.707 -0.003 -0.022)
Lab (D50): lab(65.93 -0.79 -8.32)
LCH (D50): lch(65.93 8.35 264.59)
Display P3: color(display-p3 0.6057 0.6304 0.6811)
Linear sRGB: color(srgb-linear 0.3185 0.3564 0.4287)

Gamut: sRGB and Display P3

#99A1AF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.153 and Display P3 reaches 0.165; this color uses 15% of the sRGB chroma available.

CSS snippets

.element {
  color: #99a1af;
  color: rgb(153 161 175);
  color: hsl(218 12% 64%);
  color: oklch(0.707 0.022 261.7);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.707 0.022 261.7);
}
/* arbitrary values */
class="text-[#99a1af] bg-[oklch(0.707_0.022_261.7)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.6057 0.6304 0.6811); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #99a1af 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

#ACB4C2 · oklch(0.767 0.022 261.7) · ΔL +0.06
#878F9C · oklch(0.647 0.022 261.7) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

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Guides: What is OKLCH?