OKLCH to HEX: #0000FF

Also known as: CSS blue

oklch(0.45201 0.31321 264.052) → #0000FF

Values are shown at full precision, so converting back gives exactly #0000ff. 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(0.45201 0.31321 264.052)
```

2. OKLCH → Oklab

a = C·cos H = -0.03246
b = C·sin H = -0.31152

3. Oklab → LMS′

l′ = L + 0.3963·a + 0.2158·b = 0.371918
m′ = L − 0.1056·a − 0.0639·b = 0.475328
s′ = L − 0.0895·a − 1.2915·b = 0.857243

4. cube

l = 0.371918³ = 0.051445
m = 0.475328³ = 0.107394
s = 0.857243³ = 0.629958

5. LMS → linear sRGB

R = 4.0767·l − 3.3077·m + 0.2310·s = 0.000000
G = −1.2684·l + 2.6098·m − 0.3413·s = 0.000001
B = −0.0042·l − 0.7034·m + 1.7076·s = 0.999967

6. linear → sRGB, × 255

R = 0.00000 × 255 = 0.00 → 0
G = 0.00002 × 255 = 0.00 → 0
B = 0.99999 × 255 = 255.00 → 255

7. RGB → HEX
```
#0000FF
```

All formats

HEX: #0000ff
RGB: rgb(0 0 255)
RGB (legacy): rgb(0, 0, 255)
HSL: hsl(240.00 100.00% 50.00%) → hsl(240 100% 50%)
HWB: hwb(240 0% 0%)
OKLCH: oklch(0.452 0.313 264.1) · oklch(45.2% 0.313 264.1)
OKLab: oklab(0.452 -0.032 -0.312)
Lab (D50): lab(29.57 68.29 -112.03)
LCH (D50): lch(29.57 131.20 301.36)
Display P3: color(display-p3 0.0000 0.0000 0.9596)
Linear sRGB: color(srgb-linear 0.0000 0.0000 1.0000)

Gamut: sRGB and Display P3

#0000FF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.266 and Display P3 reaches 0.313; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #0000ff;
  color: rgb(0 0 255);
  color: hsl(240 100% 50%);
  color: oklch(0.452 0.313 264.1);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.452 0.313 264.1);
}
/* arbitrary values */
class="text-[#0000ff] bg-[oklch(0.452_0.313_264.1)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.0000 0.0000 0.9596); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #0000ff 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

#0034FF · oklch(0.512 0.313 264.1) · ΔL +0.06
#0C00E9 · oklch(0.392 0.313 264.1) · ΔL −0.06

Open in the studio

Open in the OKLCH picker Check contrast on white

Other converters for this color

All converters →

Guides: What is OKLCH?