#1D188B#1D188B

#1D188B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.178 H 272.0°. Best body text is #FFFFFF at 13.50:1 contrast (WCAG AA passes).

Color values

HEX	#1D188B
RGB	rgb(29, 24, 139)
HSL	hsl(243, 71%, 32%)
HSV	hsv(243, 83%, 55%)
CMYK	cmyk(79.1%, 82.7%, 0%, 45.5%)
CIE-LAB	lab(19.13, 41.87, -61.35)
CIE-LCH	lch(19.13, 74.28, 304.31°)
OKLab	oklab(32.12% 0.0064 -0.1776)
OKLCH	oklch(32.12% 0.178 272)
XYZ	xyz(5.4920, 2.7780, 24.6678)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D188B #868B18

analogous

#184C8B #1D188B #57188B

triadic

#1D188B #8B1D18 #188B1D

tetradic

#1D188B #8B184C #868B18 #188B57

square

#1D188B #8B184C #868B18 #188B57

split-complementary

#1D188B #8B5718 #4C8B18

monochromatic

#070623 #120F57 #1D188B #2821BF #463FDE

Accessibility & contrast

On white

13.50

#1D188B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1D188B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D188B

13.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D188B	#FFFFFF	#000000	##FFFFFF
##1D188B	1.00	13.50	1.56	13.50
#FFFFFF	13.50	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348E

Deuteranopia (green-blind)

#002989

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1d188b;
/* rgb */ color: rgb(29, 24, 139);
/* oklch */ color: oklch(32.1% 0.178 272.0);

Tailwind

colors: {
  custom: {
    50: '#6f58ae',
    500: '#1d188b',
    950: '#000000',
  },
}

SCSS

$custom: #1d188b;
$custom-light: #6f58ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d188b",
  "rgb": {
    "r": 29,
    "g": 24,
    "b": 139
  },
  "hsl": {
    "h": 242.609,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.3212,
    "c": 0.17766,
    "h": 272
  },
  "luminance": 0.02779
}

Semantic roles & 50–950 ramp

primary

#1D188B

secondary

#B9BE40

accent

#ED3AE6

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090310

muted

#7B787F

Preview Lab

Preview with #1D188B

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

Preview Lab → · Contrast checker → · Palette generator →