#0A042A#0A042A

#0A042A is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.5% C 0.074 H 282.2°. Best body text is #FFFFFF at 19.74:1 contrast (WCAG AA passes).

Color values

HEX	#0A042A
RGB	rgb(10, 4, 42)
HSL	hsl(249, 83%, 9%)
HSV	hsv(249, 90%, 16%)
CMYK	cmyk(76.2%, 90.5%, 0%, 83.5%)
CIE-LAB	lab(2.88, 11.62, -22.10)
CIE-LCH	lch(2.88, 24.97, 297.74°)
OKLab	oklab(15.52% 0.0157 -0.0727)
OKLCH	oklch(15.52% 0.074 282.2)
XYZ	xyz(0.5864, 0.3185, 2.2206)
Luminance	0.0032 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A042A #242A04

analogous

#04112A #0A042A #1D042A

triadic

#0A042A #2A0A04 #042A0A

tetradic

#0A042A #2A0411 #242A04 #042A1D

square

#0A042A #2A0411 #242A04 #042A1D

split-complementary

#0A042A #2A1D04 #112A04

monochromatic

#07031C #07031C #0A042A #170962 #250F9A

Accessibility & contrast

On white

19.74

#0A042A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#0A042A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A042A

19.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A042A	#FFFFFF	#000000	##FFFFFF
##0A042A	1.00	19.74	1.06	19.74
#FFFFFF	19.74	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000C2B

Deuteranopia (green-blind)

#000929

Tritanopia (blue-blind)

#000E16

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #0a042a;
/* rgb */ color: rgb(10, 4, 42);
/* oklch */ color: oklch(15.5% 0.074 282.2);

Tailwind

colors: {
  custom: {
    50: '#4c4864',
    500: '#0a042a',
    950: '#000000',
  },
}

SCSS

$custom: #0a042a;
$custom-light: #4c4864;
$custom-dark: #000000;

JSON

{
  "hex": "#0a042a",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 42
  },
  "hsl": {
    "h": 249.474,
    "s": 82.609,
    "l": 9.02
  },
  "oklch": {
    "l": 0.15517,
    "c": 0.07441,
    "h": 282.2
  },
  "luminance": 0.00319
}

Semantic roles & 50–950 ramp

primary

#0A042A

secondary

#606D1D

accent

#F92FD9

background

#F4F4F5

surface

#E7E6EA

border

#C3C2C6

text

#010005

muted

#777779

Preview Lab

Preview with #0A042A

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

Preview Lab → · Contrast checker → · Palette generator →