#180F57#180F57

#180F57 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.3% C 0.121 H 278.1°. Best body text is #FFFFFF at 16.87:1 contrast (WCAG AA passes).

Color values

HEX	#180F57
RGB	rgb(24, 15, 87)
HSL	hsl(248, 71%, 20%)
HSV	hsv(248, 83%, 34%)
CMYK	cmyk(72.4%, 82.8%, 0%, 65.9%)
CIE-LAB	lab(10.73, 28.71, -41.45)
CIE-LCH	lch(10.73, 50.43, 304.70°)
OKLab	oklab(24.31% 0.017 -0.1197)
OKLCH	oklch(24.31% 0.121 278.1)
XYZ	xyz(2.2673, 1.2238, 9.1317)
Luminance	0.0122 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180F57 #4E570F

analogous

#0F2A57 #180F57 #3C0F57

triadic

#180F57 #57180F #0F5718

tetradic

#180F57 #570F2A #4E570F #0F573C

square

#180F57 #570F2A #4E570F #0F573C

split-complementary

#180F57 #573C0F #2A570F

monochromatic

#07051A #0A0623 #180F57 #26188B #3521BF

Accessibility & contrast

On white

16.87

#180F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#180F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180F57

16.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180F57	#FFFFFF	#000000	##FFFFFF
##180F57	1.00	16.87	1.24	16.87
#FFFFFF	16.87	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002059

Deuteranopia (green-blind)

#001A56

Tritanopia (blue-blind)

#002432

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #180f57;
/* rgb */ color: rgb(24, 15, 87);
/* oklch */ color: oklch(24.3% 0.121 278.1);

Tailwind

colors: {
  custom: {
    50: '#604f87',
    500: '#180f57',
    950: '#000000',
  },
}

SCSS

$custom: #180f57;
$custom-light: #604f87;
$custom-dark: #000000;

JSON

{
  "hex": "#180f57",
  "rgb": {
    "r": 24,
    "g": 15,
    "b": 87
  },
  "hsl": {
    "h": 247.5,
    "s": 70.588,
    "l": 20
  },
  "oklch": {
    "l": 0.24306,
    "c": 0.12095,
    "h": 278.1
  },
  "luminance": 0.01224
}

Semantic roles & 50–950 ramp

primary

#180F57

secondary

#859131

accent

#ED3AD7

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020B

muted

#7A787C

Preview Lab

Preview with #180F57

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

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