#0A0439#0A0439

#0A0439 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.5% C 0.096 H 276.2°. Best body text is #FFFFFF at 19.28:1 contrast (WCAG AA passes).

Color values

HEX	#0A0439
RGB	rgb(10, 4, 57)
HSL	hsl(247, 87%, 12%)
HSV	hsv(247, 93%, 22%)
CMYK	cmyk(82.5%, 93%, 0%, 77.6%)
CIE-LAB	lab(4.04, 19.69, -31.43)
CIE-LCH	lch(4.04, 37.09, 302.07°)
OKLab	oklab(17.53% 0.0104 -0.0955)
OKLCH	oklch(17.53% 0.096 276.2)
XYZ	xyz(0.9069, 0.4467, 3.9085)
Luminance	0.0045 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0439 #333904

analogous

#041939 #0A0439 #250439

triadic

#0A0439 #390A04 #04390A

tetradic

#0A0439 #390419 #333904 #043925

square

#0A0439 #390419 #333904 #043925

split-complementary

#0A0439 #392504 #193904

monochromatic

#05021D #05021D #0A0439 #140872 #1E0CAB

Accessibility & contrast

On white

19.28

#0A0439 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#0A0439 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0439

19.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0439	#FFFFFF	#000000	##FFFFFF
##0A0439	1.00	19.28	1.09	19.28
#FFFFFF	19.28	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00103A

Deuteranopia (green-blind)

#000C38

Tritanopia (blue-blind)

#00141E

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #0a0439;
/* rgb */ color: rgb(10, 4, 57);
/* oklch */ color: oklch(17.5% 0.096 276.2);

Tailwind

colors: {
  custom: {
    50: '#514770',
    500: '#0a0439',
    950: '#000000',
  },
}

SCSS

$custom: #0a0439;
$custom-light: #514770;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0439",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 57
  },
  "hsl": {
    "h": 246.792,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.17533,
    "c": 0.09604,
    "h": 276.2
  },
  "luminance": 0.00447
}

Semantic roles & 50–950 ramp

primary

#0A0439

secondary

#707B1E

accent

#FD2BE5

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #0A0439

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

Preview Lab → · Contrast checker → · Palette generator →