#0B1D4B#0B1D4B

#0B1D4B is a very dark, moderate blue. Relative luminance 0.015; OKLCH L 24.9% C 0.089 H 264.6°. Best body text is #FFFFFF at 16.26:1 contrast (WCAG AA passes).

Color values

HEX	#0B1D4B
RGB	rgb(11, 29, 75)
HSL	hsl(223, 74%, 17%)
HSV	hsv(223, 85%, 29%)
CMYK	cmyk(85.3%, 61.3%, 0%, 70.6%)
CIE-LAB	lab(12.34, 12.28, -30.65)
CIE-LCH	lch(12.34, 33.02, 291.84°)
OKLab	oklab(24.87% -0.0084 -0.0884)
OKLCH	oklch(24.87% 0.089 264.6)
XYZ	xyz(1.8469, 1.4577, 6.8393)
Luminance	0.0146 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B1D4B #4B390B

analogous

#0B3D4B #0B1D4B #190B4B

triadic

#0B1D4B #4B0B1D #1D4B0B

tetradic

#0B1D4B #4B0B3D #4B390B #0B4B19

square

#0B1D4B #4B0B3D #4B390B #0B4B19

split-complementary

#0B1D4B #4B190B #3D4B0B

monochromatic

#040A1B #040A1B #0B1D4B #133280 #1B46B6

Accessibility & contrast

On white

16.26

#0B1D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#0B1D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B1D4B

16.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B1D4B	#FFFFFF	#000000	##FFFFFF
##0B1D4B	1.00	16.26	1.29	16.26
#FFFFFF	16.26	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234D

Deuteranopia (green-blind)

#001D4A

Tritanopia (blue-blind)

#002830

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #0b1d4b;
/* rgb */ color: rgb(11, 29, 75);
/* oklch */ color: oklch(24.9% 0.089 264.6);

Tailwind

colors: {
  custom: {
    50: '#56587e',
    500: '#0b1d4b',
    950: '#000000',
  },
}

SCSS

$custom: #0b1d4b;
$custom-light: #56587e;
$custom-dark: #000000;

JSON

{
  "hex": "#0b1d4b",
  "rgb": {
    "r": 11,
    "g": 29,
    "b": 75
  },
  "hsl": {
    "h": 223.125,
    "s": 74.419,
    "l": 16.863
  },
  "oklch": {
    "l": 0.24871,
    "c": 0.0888,
    "h": 264.6
  },
  "luminance": 0.01458
}

Semantic roles & 50–950 ramp

primary

#0B1D4B

secondary

#876D2B

accent

#BD37F1

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#03030A

muted

#78787C

Preview Lab

Preview with #0B1D4B

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

Preview Lab → · Contrast checker → · Palette generator →