HEX to OKLCH: #FFFBEB

Also known as: Tailwind amber-50, Tailwind v3 amber-50

#FFFBEB → oklch(0.987 0.021 95.3)

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

R: 255/255 = 1.00000 → 1.000000  (((x + 0.055) / 1.055)^2.4)
G: 251/255 = 0.98431 → 0.964686  (((x + 0.055) / 1.055)^2.4)
B: 235/255 = 0.92157 → 0.830770  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.972354
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.957787
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.883440

3. cube root

l′ = ∛0.972354 = 0.990698
m′ = ∛0.957787 = 0.985726
s′ = ∛0.883440 = 0.959531

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.98688
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.00197
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = 0.02131

5. Oklab → OKLCH

C = √(a² + b²) = 0.02140
H = atan2(b, a) = 95.277°
L = 0.98688

6. OKLCH

oklch(0.98688 0.02140 95.277)
rounded: oklch(0.987 0.021 95.3)

All formats

HEX: #fffbeb
RGB: rgb(255 251 235)
RGB (legacy): rgb(255, 251, 235)
HSL: hsl(48.00 100.00% 96.08%) → hsl(48 100% 96%)
HWB: hwb(48 92% 0%)
OKLCH: oklch(0.987 0.021 95.3) · oklch(98.7% 0.021 95.3)
OKLab: oklab(0.987 -0.002 0.021)
Lab (D50): lab(98.61 -0.62 8.19)
LCH (D50): lch(98.61 8.22 94.34)
Display P3: color(display-p3 0.9972 0.9848 0.9277)
Linear sRGB: color(srgb-linear 1.0000 0.9647 0.8308)

Gamut: sRGB and Display P3

#FFFBEB is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.021 and Display P3 reaches 0.025; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #fffbeb;
  color: rgb(255 251 235);
  color: hsl(48 100% 96%);
  color: oklch(0.987 0.021 95.3);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.987 0.021 95.3);
}
/* arbitrary values */
class="text-[#fffbeb] bg-[oklch(0.987_0.021_95.3)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9972 0.9848 0.9277); }
}

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

#FFFFEF · oklch(1.000 0.021 95.3) · ΔL +0.06
#EBE7D7 · oklch(0.927 0.021 95.3) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?