#0A0437#0A0437

#0A0437 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.3% C 0.093 H 276.8°. Best body text is #FFFFFF at 19.35:1 contrast (WCAG AA passes).

Color values

HEX	#0A0437
RGB	rgb(10, 4, 55)
HSL	hsl(247, 86%, 12%)
HSV	hsv(247, 93%, 22%)
CMYK	cmyk(81.8%, 92.7%, 0%, 78.4%)
CIE-LAB	lab(3.86, 18.51, -30.25)
CIE-LCH	lch(3.86, 35.47, 301.46°)
OKLab	oklab(17.26% 0.0111 -0.0926)
OKLCH	oklch(17.26% 0.093 276.8)
XYZ	xyz(0.8580, 0.4271, 3.6509)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0437 #313704

analogous

#041837 #0A0437 #240437

triadic

#0A0437 #370A04 #04370A

tetradic

#0A0437 #370418 #313704 #043724

square

#0A0437 #370418 #313704 #043724

split-complementary

#0A0437 #372404 #183704

monochromatic

#05021D #05021D #0A0437 #140870 #1F0CA9

Accessibility & contrast

On white

19.35

#0A0437 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#0A0437 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0437

19.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0437	#FFFFFF	#000000	##FFFFFF
##0A0437	1.00	19.35	1.09	19.35
#FFFFFF	19.35	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001038

Deuteranopia (green-blind)

#000B36

Tritanopia (blue-blind)

#00131D

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #0a0437;
/* rgb */ color: rgb(10, 4, 55);
/* oklch */ color: oklch(17.3% 0.093 276.8);

Tailwind

colors: {
  custom: {
    50: '#50476e',
    500: '#0a0437',
    950: '#000000',
  },
}

SCSS

$custom: #0a0437;
$custom-light: #50476e;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0437",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 55
  },
  "hsl": {
    "h": 247.059,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.17255,
    "c": 0.09325,
    "h": 276.8
  },
  "luminance": 0.00427
}

Semantic roles & 50–950 ramp

primary

#0A0437

secondary

#6E791E

accent

#FD2BE4

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #0A0437

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

Preview Lab → · Contrast checker → · Palette generator →