#180C57#180C57

#180C57 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.9% C 0.124 H 278.7°. Best body text is #FFFFFF at 17.09:1 contrast (WCAG AA passes).

Color values

HEX	#180C57
RGB	rgb(24, 12, 87)
HSL	hsl(250, 76%, 19%)
HSV	hsv(250, 86%, 34%)
CMYK	cmyk(72.4%, 86.2%, 0%, 65.9%)
CIE-LAB	lab(10.15, 30.40, -42.42)
CIE-LCH	lch(10.15, 52.19, 305.62°)
OKLab	oklab(23.9% 0.0187 -0.1225)
OKLCH	oklch(23.9% 0.124 278.7)
XYZ	xyz(2.2279, 1.1451, 9.1186)
Luminance	0.0115 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180C57 #4B570C

analogous

#0C2657 #180C57 #3E0C57

triadic

#180C57 #57180C #0C5718

tetradic

#180C57 #570C26 #4B570C #0C573E

square

#180C57 #570C26 #4B570C #0C573E

split-complementary

#180C57 #573E0C #26570C

monochromatic

#07041B #090521 #180C57 #27138D #361BC3

Accessibility & contrast

On white

17.09

#180C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#180C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180C57

17.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180C57	#FFFFFF	#000000	##FFFFFF
##180C57	1.00	17.09	1.23	17.09
#FFFFFF	17.09	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F59

Deuteranopia (green-blind)

#001956

Tritanopia (blue-blind)

#002332

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #180c57;
/* rgb */ color: rgb(24, 12, 87);
/* oklch */ color: oklch(23.9% 0.124 278.7);

Tailwind

colors: {
  custom: {
    50: '#604d87',
    500: '#180c57',
    950: '#000000',
  },
}

SCSS

$custom: #180c57;
$custom-light: #604d87;
$custom-dark: #000000;

JSON

{
  "hex": "#180c57",
  "rgb": {
    "r": 24,
    "g": 12,
    "b": 87
  },
  "hsl": {
    "h": 249.6,
    "s": 75.758,
    "l": 19.412
  },
  "oklch": {
    "l": 0.23897,
    "c": 0.12395,
    "h": 278.7
  },
  "luminance": 0.01145
}

Semantic roles & 50–950 ramp

primary

#180C57

secondary

#82922D

accent

#F235D4

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010B

muted

#7A777C

Preview Lab

Preview with #180C57

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

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