HEX to OKLCH: #FFDF20

Result

Values are shown at full precision, so converting back gives exactly #ffdf20. 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: 255/255 = 1.00000 → 1.000000  (((x + 0.055) / 1.055)^2.4)
   G: 223/255 = 0.87451 → 0.737910  (((x + 0.055) / 1.055)^2.4)
   B: 32/255 = 0.12549 → 0.014444  (((x + 0.055) / 1.055)^2.4)

2. 2. linear sRGB → LMS

   l = 0.4122·R + 0.5363·G + 0.0514·B = 0.808730
   m = 0.2119·R + 0.6807·G + 0.1074·B = 0.715750
   s = 0.0883·R + 0.2817·G + 0.6300·B = 0.305285

3. 3. cube root

   l′ = ∛0.808730 = 0.931682
   m′ = ∛0.715750 = 0.894514
   s′ = ∛0.305285 = 0.673341

4. 4. LMS′ → Oklab

   L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.90324
   a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.02614
   b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.17982

5. 5. Oklab → OKLCH

   C = √(a² + b²) = 0.18171
   H = atan2(b, a) = 98.271°
   L = 0.90324

6. 6. OKLCH

   oklch(0.90324 0.18171 98.271)
   rounded: oklch(0.903 0.182 98.3)

All formats

HEX

#ffdf20

RGB

rgb(255 223 32)

RGB (legacy)

rgb(255, 223, 32)

HSL

hsl(51.39 100.00% 56.27%) → hsl(51 100% 56%)

HWB

hwb(51 13% 0%)

OKLCH

oklch(0.903 0.182 98.3) · oklch(90.3% 0.182 98.3)

OKLab

oklab(0.903 -0.026 0.180)

Lab (D50)

lab(89.50 -0.66 84.31)

LCH (D50)

lch(89.50 84.31 90.45)

Display P3

color(display-p3 0.9793 0.8791 0.3202)

Linear sRGB

color(srgb-linear 1.0000 0.7379 0.0144)

Gamut: sRGB and Display P3

#FFDF20 is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.182 and Display P3 reaches 0.216; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #ffdf20;
  color: rgb(255 223 32);
  color: hsl(51 100% 56%);
  color: oklch(0.903 0.182 98.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.903 0.182 98.3);
}
/* arbitrary values */
class="text-[#ffdf20] bg-[oklch(0.903_0.182_98.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9793 0.8791 0.3202); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #ffdf20 calc(l - 0.1) c h); }

Nearby colors

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

• v3 yellow-300#FDE047
• gold#FFD700
• amber-300#FFD230
• v3 amber-300#FCD34D
• v3 yellow-400#FACC15
• yellow-400#FDC700
• amber-200#FEE685
• yellow-200#FFF085

Lighter and darker, same hue and chroma

• #FFF344 · oklch(0.963 0.182 98.3) · ΔL +0.06
• #EBCB00 · oklch(0.843 0.182 98.3) · ΔL −0.06

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