#0B1B4B#0B1B4B

#0B1B4B is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.4% C 0.092 H 265.8°. Best body text is #FFFFFF at 16.50:1 contrast (WCAG AA passes).

Color values

HEX	#0B1B4B
RGB	rgb(11, 27, 75)
HSL	hsl(225, 74%, 17%)
HSV	hsv(225, 85%, 29%)
CMYK	cmyk(85.3%, 64%, 0%, 70.6%)
CIE-LAB	lab(11.71, 13.83, -31.67)
CIE-LCH	lch(11.71, 34.56, 293.59°)
OKLab	oklab(24.4% -0.0068 -0.0914)
OKLCH	oklch(24.4% 0.092 265.8)
XYZ	xyz(1.7995, 1.3628, 6.8235)
Luminance	0.0136 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.12

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B1B4B #4B3B0B

analogous

#0B3B4B #0B1B4B #1B0B4B

triadic

#0B1B4B #4B0B1B #1B4B0B

tetradic

#0B1B4B #4B0B3B #4B3B0B #0B4B1B

square

#0B1B4B #4B0B3B #4B3B0B #0B4B1B

split-complementary

#0B1B4B #4B1B0B #3B4B0B

monochromatic

#040A1B #040A1B #0B1B4B #132E80 #1B41B6

Accessibility & contrast

On white

16.50

#0B1B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#0B1B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B1B4B

16.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B1B4B	#FFFFFF	#000000	##FFFFFF
##0B1B4B	1.00	16.50	1.27	16.50
#FFFFFF	16.50	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00224D

Deuteranopia (green-blind)

#001C4A

Tritanopia (blue-blind)

#00272F

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #0b1b4b;
/* rgb */ color: rgb(11, 27, 75);
/* oklch */ color: oklch(24.4% 0.092 265.8);

Tailwind

colors: {
  custom: {
    50: '#56567e',
    500: '#0b1b4b',
    950: '#000000',
  },
}

SCSS

$custom: #0b1b4b;
$custom-light: #56567e;
$custom-dark: #000000;

JSON

{
  "hex": "#0b1b4b",
  "rgb": {
    "r": 11,
    "g": 27,
    "b": 75
  },
  "hsl": {
    "h": 225,
    "s": 74.419,
    "l": 16.863
  },
  "oklch": {
    "l": 0.24398,
    "c": 0.09169,
    "h": 265.8
  },
  "luminance": 0.01363
}

Semantic roles & 50–950 ramp

primary

#0B1B4B

secondary

#87702B

accent

#C237F1

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#03030A

muted

#78787C

Preview Lab

Preview with #0B1B4B

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

Preview Lab → · Contrast checker → · Palette generator →