HEX to OKLCH: #FBBF24

Result

Values are shown at full precision, so converting back gives exactly #fbbf24. 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. 1. sRGB → linear

   R: 251/255 = 0.98431 → 0.964686  (((x + 0.055) / 1.055)^2.4)
   G: 191/255 = 0.74902 → 0.520996  (((x + 0.055) / 1.055)^2.4)
   B: 36/255 = 0.14118 → 0.017642  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.677999
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.560957
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.243072

3. 3. cube root

   l′ = ∛0.677999 = 0.878502
   m′ = ∛0.560957 = 0.824726
   s′ = ∛0.243072 = 0.624087

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.83686
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.01596
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.16364

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.16442
   H = atan2(b, a) = 84.429°
   L = 0.83686

6. 6. OKLCH

   oklch(0.83686 0.16442 84.429)
   rounded: oklch(0.837 0.164 84.4)

All formats

HEX

#fbbf24

RGB

rgb(251 191 36)

RGB (legacy)

rgb(251, 191, 36)

HSL

hsl(43.26 96.41% 56.27%) → hsl(43 96% 56%)

HWB

hwb(43 14% 2%)

OKLCH

oklch(0.837 0.164 84.4) · oklch(83.7% 0.164 84.4)

OKLab

oklab(0.837 0.016 0.164)

Lab (D50)

lab(81.25 13.27 77.10)

LCH (D50)

lch(81.25 78.24 80.23)

Display P3

color(display-p3 0.9481 0.7584 0.2939)

Linear sRGB

color(srgb-linear 0.9647 0.5210 0.0176)

Gamut: sRGB and Display P3

#FBBF24 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.172 and Display P3 reaches 0.198; this color uses 96% of the sRGB chroma available.

CSS snippets

.element {
  color: #fbbf24;
  color: rgb(251 191 36);
  color: hsl(43 96% 56%);
  color: oklch(0.837 0.164 84.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.837 0.164 84.4);
}
/* arbitrary values */
class="text-[#fbbf24] bg-[oklch(0.837_0.164_84.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9481 0.7584 0.2939); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #fbbf24 calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

• amber-400#FFB900
• yellow-400#FDC700
• v3 yellow-400#FACC15
• yellow-500#F0B100
• v3 yellow-500#EAB308
• amber-300#FFD230
• v3 amber-300#FCD34D
• orange-300#FFB86A

Lighter and darker, same hue and chroma

• #FFD343 · oklch(0.897 0.164 84.4) · ΔL +0.06
• #E7AC00 · oklch(0.777 0.164 84.4) · ΔL −0.06

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