#0A183D#0A183D

#0A183D is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.3% C 0.074 H 265.2°. Best body text is #FFFFFF at 17.34:1 contrast (WCAG AA passes).

Color values

HEX	#0A183D
RGB	rgb(10, 24, 61)
HSL	hsl(224, 72%, 14%)
HSV	hsv(224, 84%, 24%)
CMYK	cmyk(83.6%, 60.7%, 0%, 76.1%)
CIE-LAB	lab(9.44, 9.74, -25.54)
CIE-LCH	lch(9.44, 27.33, 290.87°)
OKLab	oklab(22.28% -0.0061 -0.0735)
OKLCH	oklch(22.28% 0.074 265.2)
XYZ	xyz(1.2938, 1.0546, 4.5493)
Luminance	0.0106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A183D #3D2F0A

analogous

#0A323D #0A183D #160A3D

triadic

#0A183D #3D0A18 #183D0A

tetradic

#0A183D #3D0A32 #3D2F0A #0A3D16

square

#0A183D #3D0A32 #3D2F0A #0A3D16

split-complementary

#0A183D #3D160A #323D0A

monochromatic

#040A1A #040A1A #0A183D #132D72 #1B41A6

Accessibility & contrast

On white

17.34

#0A183D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0A183D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A183D

17.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A183D	#FFFFFF	#000000	##FFFFFF
##0A183D	1.00	17.34	1.21	17.34
#FFFFFF	17.34	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021D3E

Deuteranopia (green-blind)

#00183C

Tritanopia (blue-blind)

#002127

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0a183d;
/* rgb */ color: rgb(10, 24, 61);
/* oklch */ color: oklch(22.3% 0.074 265.2);

Tailwind

colors: {
  custom: {
    50: '#525473',
    500: '#0a183d',
    950: '#000000',
  },
}

SCSS

$custom: #0a183d;
$custom-light: #525473;
$custom-dark: #000000;

JSON

{
  "hex": "#0a183d",
  "rgb": {
    "r": 10,
    "g": 24,
    "b": 61
  },
  "hsl": {
    "h": 223.529,
    "s": 71.831,
    "l": 13.922
  },
  "oklch": {
    "l": 0.22279,
    "c": 0.07377,
    "h": 265.2
  },
  "luminance": 0.01055
}

Semantic roles & 50–950 ramp

primary

#0A183D

secondary

#7A6428

accent

#BD39EF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020208

muted

#78787B

Preview Lab

Preview with #0A183D

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

Preview Lab → · Contrast checker → · Palette generator →