#181B4E#181B4E

#181B4E is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.5% C 0.092 H 275.2°. Best body text is #FFFFFF at 16.08:1 contrast (WCAG AA passes).

Color values

HEX	#181B4E
RGB	rgb(24, 27, 78)
HSL	hsl(237, 53%, 20%)
HSV	hsv(237, 69%, 31%)
CMYK	cmyk(69.2%, 65.4%, 0%, 69.4%)
CIE-LAB	lab(12.78, 17.19, -31.95)
CIE-LCH	lch(12.78, 36.28, 298.28°)
OKLab	oklab(25.5% 0.0083 -0.0919)
OKLCH	oklch(25.5% 0.092 275.2)
XYZ	xyz(2.1433, 1.5279, 7.3882)
Luminance	0.0153 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B4E #4E4B18

analogous

#18364E #181B4E #30184E

triadic

#181B4E #4E181B #1B4E18

tetradic

#181B4E #4E1836 #4E4B18 #184E30

square

#181B4E #4E1836 #4E4B18 #184E30

split-complementary

#181B4E #4E3018 #364E18

monochromatic

#070817 #0A0B1F #181B4E #262B7D #353BAC

Accessibility & contrast

On white

16.08

#181B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B4E

16.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B4E	#FFFFFF	#000000	##FFFFFF
##181B4E	1.00	16.08	1.31	16.08
#FFFFFF	16.08	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002450

Deuteranopia (green-blind)

#001F4D

Tritanopia (blue-blind)

#002731

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181b4e;
/* rgb */ color: rgb(24, 27, 78);
/* oklch */ color: oklch(25.5% 0.092 275.2);

Tailwind

colors: {
  custom: {
    50: '#5c5780',
    500: '#181b4e',
    950: '#000000',
  },
}

SCSS

$custom: #181b4e;
$custom-light: #5c5780;
$custom-dark: #000000;

JSON

{
  "hex": "#181b4e",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 78
  },
  "hsl": {
    "h": 236.667,
    "s": 52.941,
    "l": 20
  },
  "oklch": {
    "l": 0.25502,
    "c": 0.0923,
    "h": 275.2
  },
  "luminance": 0.01528
}

Semantic roles & 50–950 ramp

primary

#181B4E

secondary

#85813D

accent

#D44BDC

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181B4E

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

Preview Lab → · Contrast checker → · Palette generator →