#0B183A#0B183A

#0B183A is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.068 H 265.4°. Best body text is #FFFFFF at 17.41:1 contrast (WCAG AA passes).

Color values

HEX	#0B183A
RGB	rgb(11, 24, 58)
HSL	hsl(223, 68%, 14%)
HSV	hsv(223, 81%, 23%)
CMYK	cmyk(81%, 58.6%, 0%, 77.3%)
CIE-LAB	lab(9.24, 8.55, -23.72)
CIE-LCH	lch(9.24, 25.21, 289.82°)
OKLab	oklab(22.06% -0.0055 -0.0681)
OKLCH	oklch(22.06% 0.068 265.4)
XYZ	xyz(1.2281, 1.0298, 4.1362)
Luminance	0.0103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B183A #3A2D0B

analogous

#0B2F3A #0B183A #150B3A

triadic

#0B183A #3A0B18 #183A0B

tetradic

#0B183A #3A0B2F #3A2D0B #0B3A15

square

#0B183A #3A0B2F #3A2D0B #0B3A15

split-complementary

#0B183A #3A150B #2F3A0B

monochromatic

#050B1A #050B1A #0B183A #152D6D #1F43A1

Accessibility & contrast

On white

17.41

#0B183A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0B183A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B183A

17.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B183A	#FFFFFF	#000000	##FFFFFF
##0B183A	1.00	17.41	1.21	17.41
#FFFFFF	17.41	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051C3B

Deuteranopia (green-blind)

#001839

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0b183a;
/* rgb */ color: rgb(11, 24, 58);
/* oklch */ color: oklch(22.1% 0.068 265.4);

Tailwind

colors: {
  custom: {
    50: '#515470',
    500: '#0b183a',
    950: '#000000',
  },
}

SCSS

$custom: #0b183a;
$custom-light: #515470;
$custom-dark: #000000;

JSON

{
  "hex": "#0b183a",
  "rgb": {
    "r": 11,
    "g": 24,
    "b": 58
  },
  "hsl": {
    "h": 223.404,
    "s": 68.116,
    "l": 13.529
  },
  "oklch": {
    "l": 0.2206,
    "c": 0.06835,
    "h": 265.4
  },
  "luminance": 0.0103
}

Semantic roles & 50–950 ramp

primary

#0B183A

secondary

#77622A

accent

#BB3DEB

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #0B183A

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

Preview Lab → · Contrast checker → · Palette generator →