#0A183F#0A183F

#0A183F is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.5% C 0.077 H 265.6°. Best body text is #FFFFFF at 17.28:1 contrast (WCAG AA passes).

Color values

HEX	#0A183F
RGB	rgb(10, 24, 63)
HSL	hsl(224, 73%, 14%)
HSV	hsv(224, 84%, 25%)
CMYK	cmyk(84.1%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(9.61, 10.65, -26.68)
CIE-LCH	lch(9.61, 28.73, 291.76°)
OKLab	oklab(22.47% -0.0059 -0.0768)
OKLCH	oklch(22.47% 0.077 265.6)
XYZ	xyz(1.3487, 1.0765, 4.8384)
Luminance	0.0108 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A183F #3F310A

analogous

#0A333F #0A183F #170A3F

triadic

#0A183F #3F0A18 #183F0A

tetradic

#0A183F #3F0A33 #3F310A #0A3F17

square

#0A183F #3F0A33 #3F310A #0A3F17

split-complementary

#0A183F #3F170A #333F0A

monochromatic

#040A1A #040A1A #0A183F #122C74 #1B40A9

Accessibility & contrast

On white

17.28

#0A183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#0A183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A183F

17.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A183F	#FFFFFF	#000000	##FFFFFF
##0A183F	1.00	17.28	1.22	17.28
#FFFFFF	17.28	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D40

Deuteranopia (green-blind)

#00183E

Tritanopia (blue-blind)

#002228

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #0a183f;
/* rgb */ color: rgb(10, 24, 63);
/* oklch */ color: oklch(22.5% 0.077 265.6);

Tailwind

colors: {
  custom: {
    50: '#525474',
    500: '#0a183f',
    950: '#000000',
  },
}

SCSS

$custom: #0a183f;
$custom-light: #525474;
$custom-dark: #000000;

JSON

{
  "hex": "#0a183f",
  "rgb": {
    "r": 10,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 224.151,
    "s": 72.603,
    "l": 14.314
  },
  "oklch": {
    "l": 0.22467,
    "c": 0.07708,
    "h": 265.6
  },
  "luminance": 0.01077
}

Semantic roles & 50–950 ramp

primary

#0A183F

secondary

#7C6629

accent

#BF38EF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A183F

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

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