#180C55#180C55

#180C55 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.7% C 0.121 H 279.2°. Best body text is #FFFFFF at 17.18:1 contrast (WCAG AA passes).

Color values

HEX	#180C55
RGB	rgb(24, 12, 85)
HSL	hsl(250, 75%, 19%)
HSV	hsv(250, 86%, 33%)
CMYK	cmyk(71.8%, 85.9%, 0%, 66.7%)
CIE-LAB	lab(9.90, 29.72, -41.47)
CIE-LCH	lch(9.90, 51.02, 305.63°)
OKLab	oklab(23.65% 0.0194 -0.1198)
OKLCH	oklch(23.65% 0.121 279.2)
XYZ	xyz(2.1473, 1.1128, 8.6942)
Luminance	0.0111 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180C55 #49550C

analogous

#0C2555 #180C55 #3D0C55

triadic

#180C55 #55180C #0C5518

tetradic

#180C55 #550C25 #49550C #0C553D

square

#180C55 #550C25 #49550C #0C553D

split-complementary

#180C55 #553D0C #25550C

monochromatic

#08041B #09041F #180C55 #27148B #361BC0

Accessibility & contrast

On white

17.18

#180C55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#180C55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180C55

17.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180C55	#FFFFFF	#000000	##FFFFFF
##180C55	1.00	17.18	1.22	17.18
#FFFFFF	17.18	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E57

Deuteranopia (green-blind)

#001854

Tritanopia (blue-blind)

#002231

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #180c55;
/* rgb */ color: rgb(24, 12, 85);
/* oklch */ color: oklch(23.7% 0.121 279.2);

Tailwind

colors: {
  custom: {
    50: '#604d86',
    500: '#180c55',
    950: '#000000',
  },
}

SCSS

$custom: #180c55;
$custom-light: #604d86;
$custom-dark: #000000;

JSON

{
  "hex": "#180c55",
  "rgb": {
    "r": 24,
    "g": 12,
    "b": 85
  },
  "hsl": {
    "h": 249.863,
    "s": 75.258,
    "l": 19.02
  },
  "oklch": {
    "l": 0.23652,
    "c": 0.12132,
    "h": 279.2
  },
  "luminance": 0.01113
}

Semantic roles & 50–950 ramp

primary

#180C55

secondary

#80902D

accent

#F236D3

background

#F6F4F8

surface

#EBE7EF

border

#C6C3CA

text

#05010B

muted

#7A777C

Preview Lab

Preview with #180C55

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

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