HEX to RGB: #0000FF

Also known as: CSS blue

#0000FF → rgb(0 0 255)

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. HEX → pairs
```
#0000FF → 00 | 00 | FF
```

2. base 16 → base 10

R = 00₁₆ = 0×16 + 0 = 0
G = 00₁₆ = 0×16 + 0 = 0
B = FF₁₆ = 15×16 + 15 = 255

3. RGB
```
rgb(0 0 255)
```

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?