HEX to OKLCH: #1E1A4D

Also known as: Tailwind indigo-950

#1E1A4D → oklch(0.257 0.091 281.4)

Values are shown at full precision, so converting back gives exactly #1e1a4d. 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: 30/255 = 0.11765 → 0.012983  (((x + 0.055) / 1.055)^2.4)
G: 26/255 = 0.10196 → 0.010330  (((x + 0.055) / 1.055)^2.4)
B: 77/255 = 0.30196 → 0.074214  (((x + 0.055) / 1.055)^2.4)

2. linear sRGB → LMS

l = 0.4122·R + 0.5363·G + 0.0514·B = 0.014710
m = 0.2119·R + 0.6807·G + 0.1074·B = 0.017753
s = 0.0883·R + 0.2817·G + 0.6300·B = 0.050810

3. cube root

l′ = ∛0.014710 = 0.245022
m′ = ∛0.017753 = 0.260870
s′ = ∛0.050810 = 0.370381

4. LMS′ → Oklab

L = 0.2105·l′ + 0.7936·m′ − 0.0041·s′ = 0.25709
a = 1.9780·l′ − 2.4286·m′ + 0.4506·s′ = 0.01800
b = 0.0259·l′ + 0.7828·m′ − 0.8087·s′ = -0.08897

5. Oklab → OKLCH

C = √(a² + b²) = 0.09077
H = atan2(b, a) = 281.436°
L = 0.25709

6. OKLCH

oklch(0.25709 0.09077 281.436)
rounded: oklch(0.257 0.091 281.4)

All formats

HEX: #1e1a4d
RGB: rgb(30 26 77)
RGB (legacy): rgb(30, 26, 77)
HSL: hsl(244.71 49.51% 20.20%) → hsl(245 50% 20%)
HWB: hwb(245 10% 70%)
OKLCH: oklch(0.257 0.091 281.4) · oklch(25.7% 0.091 281.4)
OKLab: oklab(0.257 0.018 -0.089)
Lab (D50): lab(12.48 15.22 -31.59)
LCH (D50): lch(12.48 35.07 295.73)
Display P3: color(display-p3 0.1150 0.1025 0.2903)
Linear sRGB: color(srgb-linear 0.0130 0.0103 0.0742)

Gamut: sRGB and Display P3

#1E1A4D is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.154 and Display P3 reaches 0.156; this color uses 59% of the sRGB chroma available.

CSS snippets

.element {
  color: #1e1a4d;
  color: rgb(30 26 77);
  color: hsl(245 50% 20%);
  color: oklch(0.257 0.091 281.4);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.257 0.091 281.4);
}
/* arbitrary values */
class="text-[#1e1a4d] bg-[oklch(0.257_0.091_281.4)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.1150 0.1025 0.2903); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #1e1a4d 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

#2C2A5E · oklch(0.317 0.091 281.4) · ΔL +0.06
#120A3C · oklch(0.197 0.091 281.4) · ΔL −0.06

Open in the studio

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