#1D188E#1D188E

#1D188E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.181 H 271.8°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#1D188E
RGB	rgb(29, 24, 142)
HSL	hsl(243, 71%, 33%)
HSV	hsv(243, 83%, 56%)
CMYK	cmyk(79.6%, 83.1%, 0%, 44.3%)
CIE-LAB	lab(19.50, 42.85, -62.61)
CIE-LCH	lch(19.50, 75.87, 304.38°)
OKLab	oklab(32.48% 0.0056 -0.1812)
OKLCH	oklch(32.48% 0.181 271.8)
XYZ	xyz(5.7142, 2.8668, 25.8381)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D188E #898E18

analogous

#184E8E #1D188E #58188E

triadic

#1D188E #8E1D18 #188E1D

tetradic

#1D188E #8E184E #898E18 #188E58

square

#1D188E #8E184E #898E18 #188E58

split-complementary

#1D188E #8E5818 #4E8E18

monochromatic

#080625 #120F5A #1D188E #2821C2 #4841DF

Accessibility & contrast

On white

13.35

#1D188E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1D188E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D188E

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D188E	#FFFFFF	#000000	##FFFFFF
##1D188E	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003591

Deuteranopia (green-blind)

#00298C

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d188e;
/* rgb */ color: rgb(29, 24, 142);
/* oklch */ color: oklch(32.5% 0.181 271.8);

Tailwind

colors: {
  custom: {
    50: '#6f58b0',
    500: '#1d188e',
    950: '#000000',
  },
}

SCSS

$custom: #1d188e;
$custom-light: #6f58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d188e",
  "rgb": {
    "r": 29,
    "g": 24,
    "b": 142
  },
  "hsl": {
    "h": 242.542,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32484,
    "c": 0.18128,
    "h": 271.8
  },
  "luminance": 0.02867
}

Semantic roles & 50–950 ramp

primary

#1D188E

secondary

#BAC042

accent

#EE3AE6

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1D188E

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

Preview Lab → · Contrast checker → · Palette generator →