#0A043B#0A043B

#0A043B is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.8% C 0.099 H 275.6°. Best body text is #FFFFFF at 19.21:1 contrast (WCAG AA passes).

Color values

HEX	#0A043B
RGB	rgb(10, 4, 59)
HSL	hsl(247, 87%, 12%)
HSV	hsv(247, 93%, 23%)
CMYK	cmyk(83.1%, 93.2%, 0%, 76.9%)
CIE-LAB	lab(4.22, 20.85, -32.59)
CIE-LCH	lch(4.22, 38.69, 302.60°)
OKLab	oklab(17.81% 0.0097 -0.0983)
OKLCH	oklch(17.81% 0.099 275.6)
XYZ	xyz(0.9577, 0.4670, 4.1765)
Luminance	0.0047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A043B #353B04

analogous

#041A3B #0A043B #25043B

triadic

#0A043B #3B0A04 #043B0A

tetradic

#0A043B #3B041A #353B04 #043B25

square

#0A043B #3B041A #353B04 #043B25

split-complementary

#0A043B #3B2504 #1A3B04

monochromatic

#05021D #05021D #0A043B #140874 #1D0CAE

Accessibility & contrast

On white

19.21

#0A043B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#0A043B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A043B

19.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A043B	#FFFFFF	#000000	##FFFFFF
##0A043B	1.00	19.21	1.09	19.21
#FFFFFF	19.21	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00113D

Deuteranopia (green-blind)

#000C3A

Tritanopia (blue-blind)

#001520

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #0a043b;
/* rgb */ color: rgb(10, 4, 59);
/* oklch */ color: oklch(17.8% 0.099 275.6);

Tailwind

colors: {
  custom: {
    50: '#524772',
    500: '#0a043b',
    950: '#000000',
  },
}

SCSS

$custom: #0a043b;
$custom-light: #524772;
$custom-dark: #000000;

JSON

{
  "hex": "#0a043b",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 59
  },
  "hsl": {
    "h": 246.545,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.17812,
    "c": 0.0988,
    "h": 275.6
  },
  "luminance": 0.00467
}

Semantic roles & 50–950 ramp

primary

#0A043B

secondary

#727D1E

accent

#FD2AE6

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#030008

muted

#78777B

Preview Lab

Preview with #0A043B

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

Preview Lab → · Contrast checker → · Palette generator →