#0B174B#0B174B

#0B174B is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.5% C 0.097 H 267.8°. Best body text is #FFFFFF at 16.96:1 contrast (WCAG AA passes).

Color values

HEX	#0B174B
RGB	rgb(11, 23, 75)
HSL	hsl(229, 74%, 17%)
HSV	hsv(229, 85%, 29%)
CMYK	cmyk(85.3%, 69.3%, 0%, 70.6%)
CIE-LAB	lab(10.50, 16.91, -33.65)
CIE-LCH	lch(10.50, 37.66, 296.68°)
OKLab	oklab(23.5% -0.0037 -0.0973)
OKLCH	oklch(23.5% 0.097 267.8)
XYZ	xyz(1.7140, 1.1917, 6.7949)
Luminance	0.0119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B174B #4B3F0B

analogous

#0B374B #0B174B #1F0B4B

triadic

#0B174B #4B0B17 #174B0B

tetradic

#0B174B #4B0B37 #4B3F0B #0B4B1F

square

#0B174B #4B0B37 #4B3F0B #0B4B1F

split-complementary

#0B174B #4B1F0B #374B0B

monochromatic

#04081B #04081B #0B174B #132780 #1B38B6

Accessibility & contrast

On white

16.96

#0B174B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#0B174B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B174B

16.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B174B	#FFFFFF	#000000	##FFFFFF
##0B174B	1.00	16.96	1.24	16.96
#FFFFFF	16.96	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00204D

Deuteranopia (green-blind)

#001A4A

Tritanopia (blue-blind)

#00252E

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #0b174b;
/* rgb */ color: rgb(11, 23, 75);
/* oklch */ color: oklch(23.5% 0.097 267.8);

Tailwind

colors: {
  custom: {
    50: '#56537e',
    500: '#0b174b',
    950: '#000000',
  },
}

SCSS

$custom: #0b174b;
$custom-light: #56537e;
$custom-dark: #000000;

JSON

{
  "hex": "#0b174b",
  "rgb": {
    "r": 11,
    "g": 23,
    "b": 75
  },
  "hsl": {
    "h": 228.75,
    "s": 74.419,
    "l": 16.863
  },
  "oklch": {
    "l": 0.23497,
    "c": 0.09738,
    "h": 267.8
  },
  "luminance": 0.01192
}

Semantic roles & 50–950 ramp

primary

#0B174B

secondary

#87762B

accent

#CE37F1

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#03020A

muted

#78787C

Preview Lab

Preview with #0B174B

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

Preview Lab → · Contrast checker → · Palette generator →