#0B183B#0B183B

#0B183B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.070 H 265.6°. Best body text is #FFFFFF at 17.38:1 contrast (WCAG AA passes).

Color values

HEX	#0B183B
RGB	rgb(11, 24, 59)
HSL	hsl(224, 69%, 14%)
HSV	hsv(224, 81%, 23%)
CMYK	cmyk(81.4%, 59.3%, 0%, 76.9%)
CIE-LAB	lab(9.32, 9.00, -24.30)
CIE-LCH	lch(9.32, 25.91, 290.32°)
OKLab	oklab(22.15% -0.0053 -0.0698)
OKLCH	oklch(22.15% 0.07 265.6)
XYZ	xyz(1.2538, 1.0401, 4.2715)
Luminance	0.0104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B183B #3B2E0B

analogous

#0B303B #0B183B #160B3B

triadic

#0B183B #3B0B18 #183B0B

tetradic

#0B183B #3B0B30 #3B2E0B #0B3B16

square

#0B183B #3B0B30 #3B2E0B #0B3B16

split-complementary

#0B183B #3B160B #303B0B

monochromatic

#050A1A #050A1A #0B183B #152D6F #1E42A2

Accessibility & contrast

On white

17.38

#0B183B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0B183B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B183B

17.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B183B	#FFFFFF	#000000	##FFFFFF
##0B183B	1.00	17.38	1.21	17.38
#FFFFFF	17.38	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041C3C

Deuteranopia (green-blind)

#00183A

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0b183b;
/* rgb */ color: rgb(11, 24, 59);
/* oklch */ color: oklch(22.1% 0.070 265.6);

Tailwind

colors: {
  custom: {
    50: '#515471',
    500: '#0b183b',
    950: '#000000',
  },
}

SCSS

$custom: #0b183b;
$custom-light: #515471;
$custom-dark: #000000;

JSON

{
  "hex": "#0b183b",
  "rgb": {
    "r": 11,
    "g": 24,
    "b": 59
  },
  "hsl": {
    "h": 223.75,
    "s": 68.571,
    "l": 13.725
  },
  "oklch": {
    "l": 0.2215,
    "c": 0.07003,
    "h": 265.6
  },
  "luminance": 0.0104
}

Semantic roles & 50–950 ramp

primary

#0B183B

secondary

#78632A

accent

#BC3CEB

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #0B183B

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

Preview Lab → · Contrast checker → · Palette generator →