#181F57#181F57

#181F57 is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.2% C 0.101 H 272.4°. Best body text is #FFFFFF at 15.30:1 contrast (WCAG AA passes).

Color values

HEX	#181F57
RGB	rgb(24, 31, 87)
HSL	hsl(233, 57%, 22%)
HSV	hsv(233, 72%, 34%)
CMYK	cmyk(72.4%, 64.4%, 0%, 65.9%)
CIE-LAB	lab(14.75, 17.87, -34.87)
CIE-LCH	lch(14.75, 39.18, 297.13°)
OKLab	oklab(27.21% 0.0042 -0.1005)
OKLCH	oklch(27.21% 0.101 272.4)
XYZ	xyz(2.5864, 1.8620, 9.2381)
Luminance	0.0186 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F57 #575018

analogous

#183F57 #181F57 #311857

triadic

#181F57 #57181F #1F5718

tetradic

#181F57 #57183F #575018 #185731

square

#181F57 #57183F #575018 #185731

split-complementary

#181F57 #573118 #3F5718

monochromatic

#070918 #0B0E27 #181F57 #253087 #3241B7

Accessibility & contrast

On white

15.30

#181F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#181F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F57

15.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F57	#FFFFFF	#000000	##FFFFFF
##181F57	1.00	15.30	1.37	15.30
#FFFFFF	15.30	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002859

Deuteranopia (green-blind)

#002256

Tritanopia (blue-blind)

#002D37

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #181f57;
/* rgb */ color: rgb(24, 31, 87);
/* oklch */ color: oklch(27.2% 0.101 272.4);

Tailwind

colors: {
  custom: {
    50: '#5e5a87',
    500: '#181f57',
    950: '#000000',
  },
}

SCSS

$custom: #181f57;
$custom-light: #5e5a87;
$custom-dark: #000000;

JSON

{
  "hex": "#181f57",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 87
  },
  "hsl": {
    "h": 233.333,
    "s": 56.757,
    "l": 21.765
  },
  "oklch": {
    "l": 0.27209,
    "c": 0.10056,
    "h": 272.4
  },
  "luminance": 0.01862
}

Semantic roles & 50–950 ramp

primary

#181F57

secondary

#8E853D

accent

#CF48E0

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #181F57

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

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