HEX to RGB: #FFFF00

Also known as: CSS yellow

#FFFF00 → rgb(255 255 0)

Values are shown at full precision, so converting back gives exactly #ffff00. 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
```
#FFFF00 → FF | FF | 00
```

2. base 16 → base 10

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

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

All formats

HEX: #ffff00
RGB: rgb(255 255 0)
RGB (legacy): rgb(255, 255, 0)
HSL: hsl(60.00 100.00% 50.00%) → hsl(60 100% 50%)
HWB: hwb(60 0% 0%)
OKLCH: oklch(0.968 0.211 109.8) · oklch(96.8% 0.211 109.8)
OKLab: oklab(0.968 -0.071 0.199)
Lab (D50): lab(97.61 -15.75 93.39)
LCH (D50): lch(97.61 94.71 99.57)
Display P3: color(display-p3 1.0000 1.0000 0.3309)
Linear sRGB: color(srgb-linear 1.0000 1.0000 0.0000)

Gamut: sRGB and Display P3

#FFFF00 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.211 and Display P3 reaches 0.211; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #ffff00;
  color: rgb(255 255 0);
  color: hsl(60 100% 50%);
  color: oklch(0.968 0.211 109.8);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.968 0.211 109.8);
}
/* arbitrary values */
class="text-[#ffff00] bg-[oklch(0.968_0.211_109.8)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 1.0000 1.0000 0.3309); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #ffff00 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

#FFFF2A · oklch(1.000 0.211 109.8) · ΔL +0.06
#EBEB00 · oklch(0.908 0.211 109.8) · 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?