#180D5B#180D5B

#180D5B is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.5% C 0.128 H 277.6°. Best body text is #FFFFFF at 16.84:1 contrast (WCAG AA passes).

Color values

HEX	#180D5B
RGB	rgb(24, 13, 91)
HSL	hsl(248, 75%, 20%)
HSV	hsv(248, 86%, 36%)
CMYK	cmyk(73.6%, 85.7%, 0%, 64.3%)
CIE-LAB	lab(10.83, 31.21, -44.00)
CIE-LCH	lch(10.83, 53.95, 305.35°)
OKLab	oklab(24.52% 0.0169 -0.1271)
OKLCH	oklch(24.52% 0.128 277.6)
XYZ	xyz(2.4083, 1.2372, 10.0074)
Luminance	0.0124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#180D5B #505B0D

analogous

#0D295B #180D5B #3F0D5B

triadic

#180D5B #5B180D #0D5B18

tetradic

#180D5B #5B0D29 #505B0D #0D5B3F

square

#180D5B #5B0D29 #505B0D #0D5B3F

split-complementary

#180D5B #5B3F0D #295B0D

monochromatic

#07041B #0A0525 #180D5B #261591 #341CC6

Accessibility & contrast

On white

16.84

#180D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#180D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #180D5B

16.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##180D5B	#FFFFFF	#000000	##FFFFFF
##180D5B	1.00	16.84	1.25	16.84
#FFFFFF	16.84	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205D

Deuteranopia (green-blind)

#001A5A

Tritanopia (blue-blind)

#002534

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #180d5b;
/* rgb */ color: rgb(24, 13, 91);
/* oklch */ color: oklch(24.5% 0.128 277.6);

Tailwind

colors: {
  custom: {
    50: '#614e8a',
    500: '#180d5b',
    950: '#000000',
  },
}

SCSS

$custom: #180d5b;
$custom-light: #614e8a;
$custom-dark: #000000;

JSON

{
  "hex": "#180d5b",
  "rgb": {
    "r": 24,
    "g": 13,
    "b": 91
  },
  "hsl": {
    "h": 248.462,
    "s": 75,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24518,
    "c": 0.12825,
    "h": 277.6
  },
  "luminance": 0.01237
}

Semantic roles & 50–950 ramp

primary

#180D5B

secondary

#87952F

accent

#F236D7

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #180D5B

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

Preview Lab → · Contrast checker → · Palette generator →