#181F53#181F53

#181F53 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.094 H 272.6°. Best body text is #FFFFFF at 15.44:1 contrast (WCAG AA passes).

Color values

HEX	#181F53
RGB	rgb(24, 31, 83)
HSL	hsl(233, 55%, 21%)
HSV	hsv(233, 71%, 33%)
CMYK	cmyk(71.1%, 62.7%, 0%, 67.5%)
CIE-LAB	lab(14.39, 16.25, -32.74)
CIE-LCH	lch(14.39, 36.55, 296.39°)
OKLab	oklab(26.83% 0.0042 -0.0942)
OKLCH	oklch(26.83% 0.094 272.6)
XYZ	xyz(2.4275, 1.7985, 8.4012)
Luminance	0.0180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F53 #534C18

analogous

#183C53 #181F53 #2E1853

triadic

#181F53 #53181F #1F5318

tetradic

#181F53 #53183C #534C18 #18532E

square

#181F53 #53183C #534C18 #18532E

split-complementary

#181F53 #532E18 #3C5318

monochromatic

#070918 #0A0D24 #181F53 #263182 #3342B2

Accessibility & contrast

On white

15.44

#181F53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#181F53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F53

15.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F53	#FFFFFF	#000000	##FFFFFF
##181F53	1.00	15.44	1.36	15.44
#FFFFFF	15.44	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002755

Deuteranopia (green-blind)

#002252

Tritanopia (blue-blind)

#002C35

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #181f53;
/* rgb */ color: rgb(24, 31, 83);
/* oklch */ color: oklch(26.8% 0.094 272.6);

Tailwind

colors: {
  custom: {
    50: '#5d5a84',
    500: '#181f53',
    950: '#000000',
  },
}

SCSS

$custom: #181f53;
$custom-light: #5d5a84;
$custom-dark: #000000;

JSON

{
  "hex": "#181f53",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 83
  },
  "hsl": {
    "h": 232.881,
    "s": 55.14,
    "l": 20.98
  },
  "oklch": {
    "l": 0.26835,
    "c": 0.09431,
    "h": 272.6
  },
  "luminance": 0.01799
}

Semantic roles & 50–950 ramp

primary

#181F53

secondary

#8A813D

accent

#CD49DE

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181F53

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

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