#0B043F#0B043F

#0B043F is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.5% C 0.104 H 275.5°. Best body text is #FFFFFF at 19.03:1 contrast (WCAG AA passes).

Color values

HEX	#0B043F
RGB	rgb(11, 4, 63)
HSL	hsl(247, 88%, 13%)
HSV	hsv(247, 94%, 25%)
CMYK	cmyk(82.5%, 93.7%, 0%, 75.3%)
CIE-LAB	lab(4.67, 23.26, -34.74)
CIE-LCH	lch(4.67, 41.81, 303.80°)
OKLab	oklab(18.46% 0.0099 -0.1035)
OKLCH	oklch(18.46% 0.104 275.5)
XYZ	xyz(1.0783, 0.5168, 4.7446)
Luminance	0.0052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 2.32

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B043F #383F04

analogous

#041A3F #0B043F #28043F

triadic

#0B043F #3F0B04 #043F0B

tetradic

#0B043F #3F041A #383F04 #043F28

square

#0B043F #3F041A #383F04 #043F28

split-complementary

#0B043F #3F2804 #1A3F04

monochromatic

#05021D #05021D #0B043F #150879 #1F0BB2

Accessibility & contrast

On white

19.03

#0B043F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#0B043F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B043F

19.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B043F	#FFFFFF	#000000	##FFFFFF
##0B043F	1.00	19.03	1.10	19.03
#FFFFFF	19.03	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001241

Deuteranopia (green-blind)

#000D3E

Tritanopia (blue-blind)

#001622

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #0b043f;
/* rgb */ color: rgb(11, 4, 63);
/* oklch */ color: oklch(18.5% 0.104 275.5);

Tailwind

colors: {
  custom: {
    50: '#544775',
    500: '#0b043f',
    950: '#000000',
  },
}

SCSS

$custom: #0b043f;
$custom-light: #544775;
$custom-dark: #000000;

JSON

{
  "hex": "#0b043f",
  "rgb": {
    "r": 11,
    "g": 4,
    "b": 63
  },
  "hsl": {
    "h": 247.119,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.18457,
    "c": 0.10394,
    "h": 275.5
  },
  "luminance": 0.00517
}

Semantic roles & 50–950 ramp

primary

#0B043F

secondary

#75801E

accent

#FE2AE5

background

#F5F4F7

surface

#E9E6ED

border

#C5C2C8

text

#030008

muted

#78777B

Preview Lab

Preview with #0B043F

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

Preview Lab → · Contrast checker → · Palette generator →