#0B172A#0B172A

#0B172A is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.5% C 0.042 H 259.2°. Best body text is #FFFFFF at 17.95:1 contrast (WCAG AA passes).

Color values

HEX	#0B172A
RGB	rgb(11, 23, 42)
HSL	hsl(217, 58%, 10%)
HSV	hsv(217, 74%, 16%)
CMYK	cmyk(73.8%, 45.2%, 0%, 83.5%)
CIE-LAB	lab(7.69, 2.18, -14.52)
CIE-LCH	lch(7.69, 14.68, 278.54°)
OKLab	oklab(20.48% -0.0078 -0.0411)
OKLCH	oklch(20.48% 0.042 259.2)
XYZ	xyz(0.8622, 0.8510, 2.3089)
Luminance	0.0085 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B172A #2A1E0B

analogous

#0B262A #0B172A #0E0B2A

triadic

#0B172A #2A0B17 #172A0B

tetradic

#0B172A #2A0B26 #2A1E0B #0B2A0E

square

#0B172A #2A0B26 #2A1E0B #0B2A0E

split-complementary

#0B172A #2A0E0B #262A0B

monochromatic

#060D18 #060D18 #0B172A #18325A #244C8B

Accessibility & contrast

On white

17.95

#0B172A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#0B172A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B172A

17.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B172A	#FFFFFF	#000000	##FFFFFF
##0B172A	1.00	17.95	1.17	17.95
#FFFFFF	17.95	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F182B

Deuteranopia (green-blind)

#0B162A

Tritanopia (blue-blind)

#001B1E

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #0b172a;
/* rgb */ color: rgb(11, 23, 42);
/* oklch */ color: oklch(20.5% 0.042 259.2);

Tailwind

colors: {
  custom: {
    50: '#4d5363',
    500: '#0b172a',
    950: '#000000',
  },
}

SCSS

$custom: #0b172a;
$custom-light: #4d5363;
$custom-dark: #000000;

JSON

{
  "hex": "#0b172a",
  "rgb": {
    "r": 11,
    "g": 23,
    "b": 42
  },
  "hsl": {
    "h": 216.774,
    "s": 58.491,
    "l": 10.392
  },
  "oklch": {
    "l": 0.20477,
    "c": 0.04188,
    "h": 259.2
  },
  "luminance": 0.00851
}

Semantic roles & 50–950 ramp

primary

#0B172A

secondary

#664F2B

accent

#A546E2

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010205

muted

#777879

Preview Lab

Preview with #0B172A

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

Preview Lab → · Contrast checker → · Palette generator →