HEX to OKLCH: #EFF6FF

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

#EFF6FF → oklch(0.970 0.014 254.6)

Values are shown at full precision, so converting back gives exactly #eff6ff. 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: 239/255 = 0.93725 → 0.863157  (((x + 0.055) / 1.055)^2.4)
G: 246/255 = 0.96471 → 0.921582  (((x + 0.055) / 1.055)^2.4)
B: 255/255 = 1.00000 → 1.000000  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.901532
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.917623
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.965825

3. cube root

l′ = ∛0.901532 = 0.966037
m′ = ∛0.917623 = 0.971751
s′ = ∛0.965825 = 0.988476

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.97048
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = -0.00377
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.01367

5. Oklab → OKLCH

C = √(a² + b²) = 0.01418
H = atan2(b, a) = 254.604°
L = 0.97048

6. OKLCH

oklch(0.97048 0.01418 254.604)
rounded: oklch(0.970 0.014 254.6)

All formats

HEX: #eff6ff
RGB: rgb(239 246 255)
RGB (legacy): rgb(239, 246, 255)
HSL: hsl(213.75 100.00% 96.86%) → hsl(214 100% 97%)
HWB: hwb(214 94% 0%)
OKLCH: oklch(0.970 0.014 254.6) · oklch(97.0% 0.014 254.6)
OKLab: oklab(0.970 -0.004 -0.014)
Lab (D50): lab(96.55 -1.16 -5.18)
LCH (D50): lch(96.55 5.31 257.37)
Display P3: color(display-p3 0.9422 0.9638 0.9965)
Linear sRGB: color(srgb-linear 0.8632 0.9216 1.0000)

Gamut: sRGB and Display P3

#EFF6FF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.014 and Display P3 reaches 0.016; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #eff6ff;
  color: rgb(239 246 255);
  color: hsl(214 100% 97%);
  color: oklch(0.970 0.014 254.6);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.970 0.014 254.6);
}
/* arbitrary values */
class="text-[#eff6ff] bg-[oklch(0.970_0.014_254.6)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.9422 0.9638 0.9965); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #eff6ff 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

#F9FFFF · oklch(1.000 0.014 254.6) · ΔL +0.06
#DBE2EB · oklch(0.910 0.014 254.6) · ΔL −0.06

Open in the studio

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Guides: What is OKLCH?