#181A3F#181A3F

#181A3F is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.9% C 0.069 H 277.5°. Best body text is #FFFFFF at 16.69:1 contrast (WCAG AA passes).

Color values

HEX	#181A3F
RGB	rgb(24, 26, 63)
HSL	hsl(237, 45%, 17%)
HSV	hsv(237, 62%, 25%)
CMYK	cmyk(61.9%, 58.7%, 0%, 75.3%)
CIE-LAB	lab(11.22, 11.96, -24.04)
CIE-LCH	lch(11.22, 26.85, 296.46°)
OKLab	oklab(23.93% 0.009 -0.0687)
OKLCH	oklch(23.93% 0.069 277.5)
XYZ	xyz(1.6430, 1.2918, 4.8644)
Luminance	0.0129 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A3F #3F3D18

analogous

#182E3F #181A3F #2A183F

triadic

#181A3F #3F181A #1A3F18

tetradic

#181A3F #3F182E #3F3D18 #183F2A

square

#181A3F #3F182E #3F3D18 #183F2A

split-complementary

#181A3F #3F2A18 #2E3F18

monochromatic

#080916 #080916 #181A3F #292C6B #3A3F98

Accessibility & contrast

On white

16.69

#181A3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#181A3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A3F

16.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A3F	#FFFFFF	#000000	##FFFFFF
##181A3F	1.00	16.69	1.26	16.69
#FFFFFF	16.69	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#072040

Deuteranopia (green-blind)

#031C3E

Tritanopia (blue-blind)

#062229

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181a3f;
/* rgb */ color: rgb(24, 26, 63);
/* oklch */ color: oklch(23.9% 0.069 277.5);

Tailwind

colors: {
  custom: {
    50: '#595674',
    500: '#181a3f',
    950: '#000000',
  },
}

SCSS

$custom: #181a3f;
$custom-light: #595674;
$custom-dark: #000000;

JSON

{
  "hex": "#181a3f",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 63
  },
  "hsl": {
    "h": 236.923,
    "s": 44.828,
    "l": 17.059
  },
  "oklch": {
    "l": 0.23932,
    "c": 0.06926,
    "h": 277.5
  },
  "luminance": 0.01292
}

Semantic roles & 50–950 ramp

primary

#181A3F

secondary

#75733D

accent

#CE53D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181A3F

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

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