#1B1883#1B1883

#1B1883 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 31.0% C 0.168 H 272.0°. Best body text is #FFFFFF at 13.95:1 contrast (WCAG AA passes).

Color values

HEX	#1B1883
RGB	rgb(27, 24, 131)
HSL	hsl(242, 69%, 30%)
HSV	hsv(242, 82%, 51%)
CMYK	cmyk(79.4%, 81.7%, 0%, 48.6%)
CIE-LAB	lab(18.03, 39.09, -58.15)
CIE-LCH	lch(18.03, 70.07, 303.91°)
OKLab	oklab(31.03% 0.0058 -0.1683)
OKLCH	oklch(31.03% 0.168 272)
XYZ	xyz(4.8740, 2.5244, 21.6987)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1883 #808318

analogous

#184B83 #1B1883 #501883

triadic

#1B1883 #831B18 #18831B

tetradic

#1B1883 #83184B #808318 #188350

square

#1B1883 #83184B #808318 #188350

split-complementary

#1B1883 #835018 #4B8318

monochromatic

#06051C #100F4F #1B1883 #2621B7 #3F3ADB

Accessibility & contrast

On white

13.95

#1B1883 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B1883 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1883

13.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1883	#FFFFFF	#000000	##FFFFFF
##1B1883	1.00	13.95	1.51	13.95
#FFFFFF	13.95	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003186

Deuteranopia (green-blind)

#002781

Tritanopia (blue-blind)

#00394E

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b1883;
/* rgb */ color: rgb(27, 24, 131);
/* oklch */ color: oklch(31.0% 0.168 272.0);

Tailwind

colors: {
  custom: {
    50: '#6c57a8',
    500: '#1b1883',
    950: '#000000',
  },
}

SCSS

$custom: #1b1883;
$custom-light: #6c57a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1883",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 131
  },
  "hsl": {
    "h": 241.682,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.31034,
    "c": 0.16841,
    "h": 272
  },
  "luminance": 0.02525
}

Semantic roles & 50–950 ramp

primary

#1B1883

secondary

#B4B740

accent

#EC3CE7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #1B1883

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

Preview Lab → · Contrast checker → · Palette generator →