#0B173A#0B173A

#0B173A is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.8% C 0.070 H 266.4°. Best body text is #FFFFFF at 17.53:1 contrast (WCAG AA passes).

Color values

HEX	#0B173A
RGB	rgb(11, 23, 58)
HSL	hsl(225, 68%, 14%)
HSV	hsv(225, 81%, 23%)
CMYK	cmyk(81%, 60.3%, 0%, 77.3%)
CIE-LAB	lab(8.90, 9.35, -24.26)
CIE-LCH	lch(8.90, 26.00, 291.07°)
OKLab	oklab(21.81% -0.0044 -0.0697)
OKLCH	oklch(21.81% 0.07 266.4)
XYZ	xyz(1.2079, 0.9893, 4.1295)
Luminance	0.0099 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B173A #3A2E0B

analogous

#0B2E3A #0B173A #160B3A

triadic

#0B173A #3A0B17 #173A0B

tetradic

#0B173A #3A0B2E #3A2E0B #0B3A16

square

#0B173A #3A0B2E #3A2E0B #0B3A16

split-complementary

#0B173A #3A160B #2E3A0B

monochromatic

#050A1A #050A1A #0B173A #152B6D #1F40A1

Accessibility & contrast

On white

17.53

#0B173A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#0B173A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B173A

17.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B173A	#FFFFFF	#000000	##FFFFFF
##0B173A	1.00	17.53	1.20	17.53
#FFFFFF	17.53	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031C3B

Deuteranopia (green-blind)

#001739

Tritanopia (blue-blind)

#001F25

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #0b173a;
/* rgb */ color: rgb(11, 23, 58);
/* oklch */ color: oklch(21.8% 0.070 266.4);

Tailwind

colors: {
  custom: {
    50: '#515370',
    500: '#0b173a',
    950: '#000000',
  },
}

SCSS

$custom: #0b173a;
$custom-light: #515370;
$custom-dark: #000000;

JSON

{
  "hex": "#0b173a",
  "rgb": {
    "r": 11,
    "g": 23,
    "b": 58
  },
  "hsl": {
    "h": 224.681,
    "s": 68.116,
    "l": 13.529
  },
  "oklch": {
    "l": 0.21805,
    "c": 0.06988,
    "h": 266.4
  },
  "luminance": 0.00989
}

Semantic roles & 50–950 ramp

primary

#0B173A

secondary

#77632A

accent

#BF3DEB

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #0B173A

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

Preview Lab → · Contrast checker → · Palette generator →