#181A40#181A40

#181A40 is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 24.0% C 0.071 H 277.4°. Best body text is #FFFFFF at 16.66:1 contrast (WCAG AA passes).

Color values

HEX	#181A40
RGB	rgb(24, 26, 64)
HSL	hsl(237, 45%, 17%)
HSV	hsv(237, 63%, 25%)
CMYK	cmyk(62.5%, 59.4%, 0%, 74.9%)
CIE-LAB	lab(11.30, 12.36, -24.62)
CIE-LCH	lch(11.30, 27.55, 296.66°)
OKLab	oklab(24.02% 0.0091 -0.0704)
OKLCH	oklch(24.02% 0.071 277.4)
XYZ	xyz(1.6712, 1.3030, 5.0129)
Luminance	0.0130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181A40 #403E18

analogous

#182E40 #181A40 #2A1840

triadic

#181A40 #40181A #1A4018

tetradic

#181A40 #40182E #403E18 #18402A

square

#181A40 #40182E #403E18 #18402A

split-complementary

#181A40 #402A18 #2E4018

monochromatic

#080916 #080916 #181A40 #292C6D #393E99

Accessibility & contrast

On white

16.66

#181A40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#181A40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181A40

16.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181A40	#FFFFFF	#000000	##FFFFFF
##181A40	1.00	16.66	1.26	16.66
#FFFFFF	16.66	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#062041

Deuteranopia (green-blind)

#021C3F

Tritanopia (blue-blind)

#05232A

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #181a40;
/* rgb */ color: rgb(24, 26, 64);
/* oklch */ color: oklch(24.0% 0.071 277.4);

Tailwind

colors: {
  custom: {
    50: '#595675',
    500: '#181a40',
    950: '#000000',
  },
}

SCSS

$custom: #181a40;
$custom-light: #595675;
$custom-dark: #000000;

JSON

{
  "hex": "#181a40",
  "rgb": {
    "r": 24,
    "g": 26,
    "b": 64
  },
  "hsl": {
    "h": 237,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.24017,
    "c": 0.07095,
    "h": 277.4
  },
  "luminance": 0.01303
}

Semantic roles & 50–950 ramp

primary

#181A40

secondary

#77743D

accent

#CF53D5

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040308

muted

#79787B

Preview Lab

Preview with #181A40

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

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