#180D55#180D55

#180D55 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.8% C 0.120 H 279.0°. Best body text is #FFFFFF at 17.11:1 contrast (WCAG AA passes).

Color values

HEX	#180D55
RGB	rgb(24, 13, 85)
HSL	hsl(249, 73%, 19%)
HSV	hsv(249, 85%, 33%)
CMYK	cmyk(71.8%, 84.7%, 0%, 66.7%)
CIE-LAB	lab(10.09, 29.17, -41.16)
CIE-LCH	lch(10.09, 50.44, 305.32°)
OKLab	oklab(23.79% 0.0188 -0.1188)
OKLCH	oklch(23.79% 0.12 279)
XYZ	xyz(2.1598, 1.1377, 8.6984)
Luminance	0.0114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180D55 #4A550D

analogous

#0D2655 #180D55 #3C0D55

triadic

#180D55 #55180D #0D5518

tetradic

#180D55 #550D26 #4A550D #0D553C

square

#180D55 #550D26 #4A550D #0D553C

split-complementary

#180D55 #553C0D #26550D

monochromatic

#07041B #090520 #180D55 #27158A #361DBF

Accessibility & contrast

On white

17.11

#180D55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#180D55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180D55

17.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180D55	#FFFFFF	#000000	##FFFFFF
##180D55	1.00	17.11	1.23	17.11
#FFFFFF	17.11	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E57

Deuteranopia (green-blind)

#001954

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #180d55;
/* rgb */ color: rgb(24, 13, 85);
/* oklch */ color: oklch(23.8% 0.120 279.0);

Tailwind

colors: {
  custom: {
    50: '#604e86',
    500: '#180d55',
    950: '#000000',
  },
}

SCSS

$custom: #180d55;
$custom-light: #604e86;
$custom-dark: #000000;

JSON

{
  "hex": "#180d55",
  "rgb": {
    "r": 24,
    "g": 13,
    "b": 85
  },
  "hsl": {
    "h": 249.167,
    "s": 73.469,
    "l": 19.216
  },
  "oklch": {
    "l": 0.23786,
    "c": 0.12032,
    "h": 279
  },
  "luminance": 0.01138
}

Semantic roles & 50–950 ramp

primary

#180D55

secondary

#81902E

accent

#F038D4

background

#F6F4F8

surface

#EBE7EF

border

#C6C3CA

text

#05010B

muted

#7A777C

Preview Lab

Preview with #180D55

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

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