#0A042B#0A042B

#0A042B is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.6% C 0.076 H 281.7°. Best body text is #FFFFFF at 19.71:1 contrast (WCAG AA passes).

Color values

HEX	#0A042B
RGB	rgb(10, 4, 43)
HSL	hsl(249, 83%, 9%)
HSV	hsv(249, 91%, 17%)
CMYK	cmyk(76.7%, 90.7%, 0%, 83.1%)
CIE-LAB	lab(2.94, 12.08, -22.76)
CIE-LCH	lch(2.94, 25.76, 297.96°)
OKLab	oklab(15.65% 0.0154 -0.0743)
OKLCH	oklch(15.65% 0.076 281.7)
XYZ	xyz(0.6045, 0.3257, 2.3160)
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

#0A042B #252B04

analogous

#04122B #0A042B #1E042B

triadic

#0A042B #2B0A04 #042B0A

tetradic

#0A042B #2B0412 #252B04 #042B1E

square

#0A042B #2B0412 #252B04 #042B1E

split-complementary

#0A042B #2B1E04 #122B04

monochromatic

#07031C #07031C #0A042B #170963 #240E9B

Accessibility & contrast

On white

19.71

#0A042B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#0A042B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A042B

19.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A042B	#FFFFFF	#000000	##FFFFFF
##0A042B	1.00	19.71	1.07	19.71
#FFFFFF	19.71	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000C2C

Deuteranopia (green-blind)

#00092A

Tritanopia (blue-blind)

#000E16

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #0a042b;
/* rgb */ color: rgb(10, 4, 43);
/* oklch */ color: oklch(15.6% 0.076 281.7);

Tailwind

colors: {
  custom: {
    50: '#4c4864',
    500: '#0a042b',
    950: '#000000',
  },
}

SCSS

$custom: #0a042b;
$custom-light: #4c4864;
$custom-dark: #000000;

JSON

{
  "hex": "#0a042b",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 43
  },
  "hsl": {
    "h": 249.231,
    "s": 82.979,
    "l": 9.216
  },
  "oklch": {
    "l": 0.15646,
    "c": 0.0759,
    "h": 281.7
  },
  "luminance": 0.00326
}

Semantic roles & 50–950 ramp

primary

#0A042B

secondary

#616E1D

accent

#F92EDA

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010005

muted

#77777A

Preview Lab

Preview with #0A042B

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

Preview Lab → · Contrast checker → · Palette generator →