#0B172F#0B172F

#0B172F is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.9% C 0.051 H 262.8°. Best body text is #FFFFFF at 17.83:1 contrast (WCAG AA passes).

Color values

HEX	#0B172F
RGB	rgb(11, 23, 47)
HSL	hsl(220, 62%, 11%)
HSV	hsv(220, 77%, 18%)
CMYK	cmyk(76.6%, 51.1%, 0%, 81.6%)
CIE-LAB	lab(8.03, 4.40, -17.67)
CIE-LCH	lch(8.03, 18.21, 283.97°)
OKLab	oklab(20.86% -0.0064 -0.0504)
OKLCH	oklch(20.86% 0.051 262.8)
XYZ	xyz(0.9573, 0.8891, 2.8099)
Luminance	0.0089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B172F #2F230B

analogous

#0B292F #0B172F #110B2F

triadic

#0B172F #2F0B17 #172F0B

tetradic

#0B172F #2F0B29 #2F230B #0B2F11

square

#0B172F #2F0B29 #2F230B #0B2F11

split-complementary

#0B172F #2F110B #292F0B

monochromatic

#060C19 #060C19 #0B172F #172F61 #224892

Accessibility & contrast

On white

17.83

#0B172F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#0B172F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B172F

17.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B172F	#FFFFFF	#000000	##FFFFFF
##0B172F	1.00	17.83	1.18	17.83
#FFFFFF	17.83	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C1930

Deuteranopia (green-blind)

#07162E

Tritanopia (blue-blind)

#001C20

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #0b172f;
/* rgb */ color: rgb(11, 23, 47);
/* oklch */ color: oklch(20.9% 0.051 262.8);

Tailwind

colors: {
  custom: {
    50: '#4e5367',
    500: '#0b172f',
    950: '#000000',
  },
}

SCSS

$custom: #0b172f;
$custom-light: #4e5367;
$custom-dark: #000000;

JSON

{
  "hex": "#0b172f",
  "rgb": {
    "r": 11,
    "g": 23,
    "b": 47
  },
  "hsl": {
    "h": 220,
    "s": 62.069,
    "l": 11.373
  },
  "oklch": {
    "l": 0.2086,
    "c": 0.05077,
    "h": 262.8
  },
  "luminance": 0.00889
}

Semantic roles & 50–950 ramp

primary

#0B172F

secondary

#6B562A

accent

#AF43E5

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020206

muted

#78787A

Preview Lab

Preview with #0B172F

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

Preview Lab → · Contrast checker → · Palette generator →