OKLCH to HEX: #51A2FF

Also known as: Tailwind blue-400

oklch(0.70400 0.15827 253.627) → #51A2FF

Values are shown at full precision, so converting back gives exactly #51a2ff. 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(0.70400 0.15827 253.627)
```

2. OKLCH → Oklab

a = C·cos H = -0.04461
b = C·sin H = -0.15185

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.653547
m′ = L − 0.1056·a − 0.0639·b = 0.718406
s′ = L − 0.0895·a − 1.2915·b = 0.904107

4. cube

l = 0.653547³ = 0.279146
m = 0.718406³ = 0.370774
s = 0.904107³ = 0.739024

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.082283
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.361309
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.999988

6. linear → sRGB, × 255

R = 0.31765 × 255 = 81.00 → 81
G = 0.63530 × 255 = 162.00 → 162
B = 0.99999 × 255 = 255.00 → 255

7. RGB → HEX
```
#51A2FF
```

All formats

HEX: #51a2ff
RGB: rgb(81 162 255)
RGB (legacy): rgb(81, 162, 255)
HSL: hsl(212.07 100.00% 65.88%) → hsl(212 100% 66%)
HWB: hwb(212 32% 0%)
OKLCH: oklch(0.704 0.158 253.6) · oklch(70.4% 0.158 253.6)
OKLab: oklab(0.704 -0.045 -0.152)
Lab (D50): lab(64.80 -2.79 -54.46)
LCH (D50): lch(64.80 54.53 267.07)
Display P3: color(display-p3 0.3985 0.6279 0.9723)
Linear sRGB: color(srgb-linear 0.0823 0.3613 1.0000)

Gamut: sRGB and Display P3

#51A2FF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.158 and Display P3 reaches 0.171; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #51a2ff;
  color: rgb(81 162 255);
  color: hsl(212 100% 66%);
  color: oklch(0.704 0.158 253.6);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.704 0.158 253.6);
}
/* arbitrary values */
class="text-[#51a2ff] bg-[oklch(0.704_0.158_253.6)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.3985 0.6279 0.9723); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #51a2ff 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

#64B5FF · oklch(0.764 0.158 253.6) · ΔL +0.06
#3D8FEA · oklch(0.644 0.158 253.6) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

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Guides: What is OKLCH?