#181B4F#181B4F

#181B4F is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.6% C 0.094 H 275.1°. Best body text is #FFFFFF at 16.05:1 contrast (WCAG AA passes).

Color values

HEX	#181B4F
RGB	rgb(24, 27, 79)
HSL	hsl(237, 53%, 20%)
HSV	hsv(237, 70%, 31%)
CMYK	cmyk(69.6%, 65.8%, 0%, 69%)
CIE-LAB	lab(12.88, 17.59, -32.48)
CIE-LCH	lch(12.88, 36.94, 298.43°)
OKLab	oklab(25.6% 0.0083 -0.0935)
OKLCH	oklch(25.6% 0.094 275.1)
XYZ	xyz(2.1794, 1.5424, 7.5785)
Luminance	0.0154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181B4F #4F4C18

analogous

#18374F #181B4F #30184F

triadic

#181B4F #4F181B #1B4F18

tetradic

#181B4F #4F1837 #4F4C18 #184F30

square

#181B4F #4F1837 #4F4C18 #184F30

split-complementary

#181B4F #4F3018 #374F18

monochromatic

#070817 #0A0B20 #181B4F #262B7E #353BAD

Accessibility & contrast

On white

16.05

#181B4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#181B4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181B4F

16.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181B4F	#FFFFFF	#000000	##FFFFFF
##181B4F	1.00	16.05	1.31	16.05
#FFFFFF	16.05	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002451

Deuteranopia (green-blind)

#001F4E

Tritanopia (blue-blind)

#002832

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #181b4f;
/* rgb */ color: rgb(24, 27, 79);
/* oklch */ color: oklch(25.6% 0.094 275.1);

Tailwind

colors: {
  custom: {
    50: '#5c5781',
    500: '#181b4f',
    950: '#000000',
  },
}

SCSS

$custom: #181b4f;
$custom-light: #5c5781;
$custom-dark: #000000;

JSON

{
  "hex": "#181b4f",
  "rgb": {
    "r": 24,
    "g": 27,
    "b": 79
  },
  "hsl": {
    "h": 236.727,
    "s": 53.398,
    "l": 20.196
  },
  "oklch": {
    "l": 0.25597,
    "c": 0.09387,
    "h": 275.1
  },
  "luminance": 0.01543
}

Semantic roles & 50–950 ramp

primary

#181B4F

secondary

#86823D

accent

#D54BDD

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #181B4F

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

Preview Lab → · Contrast checker → · Palette generator →