#0A042C#0A042C

#0A042C is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.8% C 0.077 H 281.2°. Best body text is #FFFFFF at 19.69:1 contrast (WCAG AA passes).

Color values

HEX	#0A042C
RGB	rgb(10, 4, 44)
HSL	hsl(249, 83%, 9%)
HSV	hsv(249, 91%, 17%)
CMYK	cmyk(77.3%, 90.9%, 0%, 82.7%)
CIE-LAB	lab(3.01, 12.55, -23.41)
CIE-LCH	lch(3.01, 26.56, 298.20°)
OKLab	oklab(15.78% 0.015 -0.0759)
OKLCH	oklch(15.78% 0.077 281.2)
XYZ	xyz(0.6231, 0.3332, 2.4139)
Luminance	0.0033 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A042C #262C04

analogous

#04122C #0A042C #1E042C

triadic

#0A042C #2C0A04 #042C0A

tetradic

#0A042C #2C0412 #262C04 #042C1E

square

#0A042C #2C0412 #262C04 #042C1E

split-complementary

#0A042C #2C1E04 #122C04

monochromatic

#06031C #06031C #0A042C #170964 #240E9C

Accessibility & contrast

On white

19.69

#0A042C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#0A042C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A042C

19.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A042C	#FFFFFF	#000000	##FFFFFF
##0A042C	1.00	19.69	1.07	19.69
#FFFFFF	19.69	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000C2D

Deuteranopia (green-blind)

#00092B

Tritanopia (blue-blind)

#000F17

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #0a042c;
/* rgb */ color: rgb(10, 4, 44);
/* oklch */ color: oklch(15.8% 0.077 281.2);

Tailwind

colors: {
  custom: {
    50: '#4c4865',
    500: '#0a042c',
    950: '#000000',
  },
}

SCSS

$custom: #0a042c;
$custom-light: #4c4865;
$custom-dark: #000000;

JSON

{
  "hex": "#0a042c",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 44
  },
  "hsl": {
    "h": 249,
    "s": 83.333,
    "l": 9.412
  },
  "oklch": {
    "l": 0.15776,
    "c": 0.0774,
    "h": 281.2
  },
  "luminance": 0.00333
}

Semantic roles & 50–950 ramp

primary

#0A042C

secondary

#626F1D

accent

#FA2EDB

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010005

muted

#77777A

Preview Lab

Preview with #0A042C

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

Preview Lab → · Contrast checker → · Palette generator →