#1B1371#1B1371

#1B1371 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.2% C 0.150 H 274.6°. Best body text is #FFFFFF at 15.24:1 contrast (WCAG AA passes).

Color values

HEX	#1B1371
RGB	rgb(27, 19, 113)
HSL	hsl(245, 71%, 26%)
HSV	hsv(245, 83%, 44%)
CMYK	cmyk(76.1%, 83.2%, 0%, 55.7%)
CIE-LAB	lab(14.90, 35.71, -51.80)
CIE-LCH	lch(14.90, 62.92, 304.58°)
OKLab	oklab(28.21% 0.0122 -0.1498)
OKLCH	oklch(28.21% 0.15 274.6)
XYZ	xyz(3.6645, 1.8906, 15.7914)
Luminance	0.0189 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1371 #697113

analogous

#133A71 #1B1371 #4A1371

triadic

#1B1371 #711B13 #13711B

tetradic

#1B1371 #71133A #697113 #13714A

square

#1B1371 #71133A #697113 #13714A

split-complementary

#1B1371 #714A13 #3A7113

monochromatic

#06041A #0E0A3D #1B1371 #281CA5 #3425DA

Accessibility & contrast

On white

15.24

#1B1371 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#1B1371 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1371

15.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1371	#FFFFFF	#000000	##FFFFFF
##1B1371	1.00	15.24	1.38	15.24
#FFFFFF	15.24	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A74

Deuteranopia (green-blind)

#00216F

Tritanopia (blue-blind)

#003042

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b1371;
/* rgb */ color: rgb(27, 19, 113);
/* oklch */ color: oklch(28.2% 0.150 274.6);

Tailwind

colors: {
  custom: {
    50: '#67539b',
    500: '#1b1371',
    950: '#000000',
  },
}

SCSS

$custom: #1b1371;
$custom-light: #67539b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1371",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 113
  },
  "hsl": {
    "h": 245.106,
    "s": 71.212,
    "l": 25.882
  },
  "oklch": {
    "l": 0.28212,
    "c": 0.15029,
    "h": 274.6
  },
  "luminance": 0.01891
}

Semantic roles & 50–950 ramp

primary

#1B1371

secondary

#9EA838

accent

#EE3ADF

background

#F6F4F9

surface

#ECE7F2

border

#C7C3CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1371

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →