#1D188D#1D188D

#1D188D is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.4% C 0.180 H 271.9°. Best body text is #FFFFFF at 13.40:1 contrast (WCAG AA passes).

Color values

HEX	#1D188D
RGB	rgb(29, 24, 141)
HSL	hsl(243, 71%, 32%)
HSV	hsv(243, 83%, 55%)
CMYK	cmyk(79.4%, 83%, 0%, 44.7%)
CIE-LAB	lab(19.38, 42.52, -62.19)
CIE-LCH	lch(19.38, 75.34, 304.36°)
OKLab	oklab(32.36% 0.0059 -0.18)
OKLCH	oklch(32.36% 0.18 271.9)
XYZ	xyz(5.6394, 2.8369, 25.4445)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D188D #888D18

analogous

#184E8D #1D188D #57188D

triadic

#1D188D #8D1D18 #188D1D

tetradic

#1D188D #8D184E #888D18 #188D57

square

#1D188D #8D184E #888D18 #188D57

split-complementary

#1D188D #8D5718 #4E8D18

monochromatic

#070624 #120F59 #1D188D #2821C1 #4841DF

Accessibility & contrast

On white

13.40

#1D188D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1D188D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D188D

13.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D188D	#FFFFFF	#000000	##FFFFFF
##1D188D	1.00	13.40	1.57	13.40
#FFFFFF	13.40	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003590

Deuteranopia (green-blind)

#00298B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d188d;
/* rgb */ color: rgb(29, 24, 141);
/* oklch */ color: oklch(32.4% 0.180 271.9);

Tailwind

colors: {
  custom: {
    50: '#6f58b0',
    500: '#1d188d',
    950: '#000000',
  },
}

SCSS

$custom: #1d188d;
$custom-light: #6f58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d188d",
  "rgb": {
    "r": 29,
    "g": 24,
    "b": 141
  },
  "hsl": {
    "h": 242.564,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32363,
    "c": 0.18008,
    "h": 271.9
  },
  "luminance": 0.02838
}

Semantic roles & 50–950 ramp

primary

#1D188D

secondary

#BABF42

accent

#EE3AE6

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1D188D

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

Preview Lab → · Contrast checker → · Palette generator →