#0B043A#0B043A

#0B043A is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.8% C 0.097 H 276.9°. Best body text is #FFFFFF at 19.22:1 contrast (WCAG AA passes).

Color values

HEX	#0B043A
RGB	rgb(11, 4, 58)
HSL	hsl(248, 87%, 12%)
HSV	hsv(248, 93%, 23%)
CMYK	cmyk(81%, 93.1%, 0%, 77.3%)
CIE-LAB	lab(4.19, 20.50, -31.91)
CIE-LCH	lch(4.19, 37.93, 302.72°)
OKLab	oklab(17.76% 0.0117 -0.0964)
OKLCH	oklch(17.76% 0.097 276.9)
XYZ	xyz(0.9449, 0.4634, 4.0418)
Luminance	0.0046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B043A #333A04

analogous

#04183A #0B043A #26043A

triadic

#0B043A #3A0B04 #043A0B

tetradic

#0B043A #3A0418 #333A04 #043A26

square

#0B043A #3A0418 #333A04 #043A26

split-complementary

#0B043A #3A2604 #183A04

monochromatic

#05021D #05021D #0B043A #160873 #210CAD

Accessibility & contrast

On white

19.22

#0B043A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#0B043A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B043A

19.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B043A	#FFFFFF	#000000	##FFFFFF
##0B043A	1.00	19.22	1.09	19.22
#FFFFFF	19.22	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00113B

Deuteranopia (green-blind)

#000C39

Tritanopia (blue-blind)

#00141F

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #0b043a;
/* rgb */ color: rgb(11, 4, 58);
/* oklch */ color: oklch(17.8% 0.097 276.9);

Tailwind

colors: {
  custom: {
    50: '#524771',
    500: '#0b043a',
    950: '#000000',
  },
}

SCSS

$custom: #0b043a;
$custom-light: #524771;
$custom-dark: #000000;

JSON

{
  "hex": "#0b043a",
  "rgb": {
    "r": 11,
    "g": 4,
    "b": 58
  },
  "hsl": {
    "h": 247.778,
    "s": 87.097,
    "l": 12.157
  },
  "oklch": {
    "l": 0.17759,
    "c": 0.09714,
    "h": 276.9
  },
  "luminance": 0.00463
}

Semantic roles & 50–950 ramp

primary

#0B043A

secondary

#707C1E

accent

#FD2BE2

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#030008

muted

#78777B

Preview Lab

Preview with #0B043A

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

Preview Lab → · Contrast checker → · Palette generator →