#0A042F#0A042F

#0A042F is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.2% C 0.082 H 279.8°. Best body text is #FFFFFF at 19.60:1 contrast (WCAG AA passes).

Color values

HEX	#0A042F
RGB	rgb(10, 4, 47)
HSL	hsl(248, 84%, 10%)
HSV	hsv(248, 91%, 18%)
CMYK	cmyk(78.7%, 91.5%, 0%, 81.6%)
CIE-LAB	lab(3.22, 14.04, -25.34)
CIE-LCH	lch(3.22, 28.97, 298.98°)
OKLab	oklab(16.17% 0.014 -0.0806)
OKLCH	oklch(16.17% 0.082 279.8)
XYZ	xyz(0.6815, 0.3565, 2.7217)
Luminance	0.0036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A042F #292F04

analogous

#04142F #0A042F #1F042F

triadic

#0A042F #2F0A04 #042F0A

tetradic

#0A042F #2F0414 #292F04 #042F1F

square

#0A042F #2F0414 #292F04 #042F1F

split-complementary

#0A042F #2F1F04 #142F04

monochromatic

#06021C #06021C #0A042F #160967 #220EA0

Accessibility & contrast

On white

19.60

#0A042F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#0A042F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A042F

19.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A042F	#FFFFFF	#000000	##FFFFFF
##0A042F	1.00	19.60	1.07	19.60
#FFFFFF	19.60	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000D30

Deuteranopia (green-blind)

#000A2E

Tritanopia (blue-blind)

#001019

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #0a042f;
/* rgb */ color: rgb(10, 4, 47);
/* oklch */ color: oklch(16.2% 0.082 279.8);

Tailwind

colors: {
  custom: {
    50: '#4d4868',
    500: '#0a042f',
    950: '#000000',
  },
}

SCSS

$custom: #0a042f;
$custom-light: #4d4868;
$custom-dark: #000000;

JSON

{
  "hex": "#0a042f",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 47
  },
  "hsl": {
    "h": 248.372,
    "s": 84.314,
    "l": 10
  },
  "oklch": {
    "l": 0.1617,
    "c": 0.08182,
    "h": 279.8
  },
  "luminance": 0.00357
}

Semantic roles & 50–950 ramp

primary

#0A042F

secondary

#66721D

accent

#FB2DDE

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#020006

muted

#78777A

Preview Lab

Preview with #0A042F

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

Preview Lab → · Contrast checker → · Palette generator →