#0B023A#0B023A

#0B023A is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.3% C 0.100 H 277.6°. Best body text is #FFFFFF at 19.37:1 contrast (WCAG AA passes).

Color values

HEX	#0B023A
RGB	rgb(11, 2, 58)
HSL	hsl(250, 93%, 12%)
HSV	hsv(250, 97%, 23%)
CMYK	cmyk(81%, 96.6%, 0%, 77.3%)
CIE-LAB	lab(3.79, 21.36, -32.55)
CIE-LCH	lch(3.79, 38.93, 303.28°)
OKLab	oklab(17.33% 0.0133 -0.0993)
OKLCH	oklch(17.33% 0.1 277.6)
XYZ	xyz(0.9232, 0.4200, 4.0346)
Luminance	0.0042 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B023A #313A02

analogous

#02153A #0B023A #27023A

triadic

#0B023A #3A0B02 #023A0B

tetradic

#0B023A #3A0215 #313A02 #023A27

square

#0B023A #3A0215 #313A02 #023A27

split-complementary

#0B023A #3A2702 #153A02

monochromatic

#06011E #06011E #0B023A #160475 #2106B0

Accessibility & contrast

On white

19.37

#0B023A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#0B023A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B023A

19.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B023A	#FFFFFF	#000000	##FFFFFF
##0B023A	1.00	19.37	1.08	19.37
#FFFFFF	19.37	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00103C

Deuteranopia (green-blind)

#000B39

Tritanopia (blue-blind)

#00131E

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #0b023a;
/* rgb */ color: rgb(11, 2, 58);
/* oklch */ color: oklch(17.3% 0.100 277.6);

Tailwind

colors: {
  custom: {
    50: '#524671',
    500: '#0b023a',
    950: '#000000',
  },
}

SCSS

$custom: #0b023a;
$custom-light: #524671;
$custom-dark: #000000;

JSON

{
  "hex": "#0b023a",
  "rgb": {
    "r": 11,
    "g": 2,
    "b": 58
  },
  "hsl": {
    "h": 249.643,
    "s": 93.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.17334,
    "c": 0.10022,
    "h": 277.6
  },
  "luminance": 0.0042
}

Semantic roles & 50–950 ramp

primary

#0B023A

secondary

#6E7D1A

accent

#FF29DD

background

#F4F3F6

surface

#E7E5EC

border

#C3C1C7

text

#030008

muted

#78777B

Preview Lab

Preview with #0B023A

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

Preview Lab → · Contrast checker → · Palette generator →