#0B183D#0B183D

#0B183D is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.3% C 0.073 H 266.0°. Best body text is #FFFFFF at 17.32:1 contrast (WCAG AA passes).

Color values

HEX	#0B183D
RGB	rgb(11, 24, 61)
HSL	hsl(224, 69%, 14%)
HSV	hsv(224, 82%, 24%)
CMYK	cmyk(82%, 60.7%, 0%, 76.1%)
CIE-LAB	lab(9.49, 9.90, -25.45)
CIE-LCH	lch(9.49, 27.31, 291.26°)
OKLab	oklab(22.33% -0.0051 -0.0732)
OKLCH	oklch(22.33% 0.073 266)
XYZ	xyz(1.3067, 1.0612, 4.5499)
Luminance	0.0106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B183D #3D300B

analogous

#0B313D #0B183D #170B3D

triadic

#0B183D #3D0B18 #183D0B

tetradic

#0B183D #3D0B31 #3D300B #0B3D17

square

#0B183D #3D0B31 #3D300B #0B3D17

split-complementary

#0B183D #3D170B #313D0B

monochromatic

#050A1A #050A1A #0B183D #142C71 #1E41A5

Accessibility & contrast

On white

17.32

#0B183D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0B183D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B183D

17.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B183D	#FFFFFF	#000000	##FFFFFF
##0B183D	1.00	17.32	1.21	17.32
#FFFFFF	17.32	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021D3E

Deuteranopia (green-blind)

#00183C

Tritanopia (blue-blind)

#002127

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0b183d;
/* rgb */ color: rgb(11, 24, 61);
/* oklch */ color: oklch(22.3% 0.073 266.0);

Tailwind

colors: {
  custom: {
    50: '#525473',
    500: '#0b183d',
    950: '#000000',
  },
}

SCSS

$custom: #0b183d;
$custom-light: #525473;
$custom-dark: #000000;

JSON

{
  "hex": "#0b183d",
  "rgb": {
    "r": 11,
    "g": 24,
    "b": 61
  },
  "hsl": {
    "h": 224.4,
    "s": 69.444,
    "l": 14.118
  },
  "oklch": {
    "l": 0.22333,
    "c": 0.0734,
    "h": 266
  },
  "luminance": 0.01061
}

Semantic roles & 50–950 ramp

primary

#0B183D

secondary

#7A652A

accent

#BE3CEC

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020208

muted

#78787B

Preview Lab

Preview with #0B183D

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

Preview Lab → · Contrast checker → · Palette generator →