#0A173B#0A173B

#0A173B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.8% C 0.072 H 265.7°. Best body text is #FFFFFF at 17.52:1 contrast (WCAG AA passes).

Color values

HEX	#0A173B
RGB	rgb(10, 23, 59)
HSL	hsl(224, 71%, 14%)
HSV	hsv(224, 83%, 23%)
CMYK	cmyk(83.1%, 61%, 0%, 76.9%)
CIE-LAB	lab(8.93, 9.62, -24.93)
CIE-LCH	lch(8.93, 26.72, 291.10°)
OKLab	oklab(21.84% -0.0054 -0.0717)
OKLCH	oklch(21.84% 0.072 265.7)
XYZ	xyz(1.2207, 0.9930, 4.2642)
Luminance	0.0099 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A173B #3B2E0A

analogous

#0A2F3B #0A173B #150A3B

triadic

#0A173B #3B0A17 #173B0A

tetradic

#0A173B #3B0A2F #3B2E0A #0A3B15

square

#0A173B #3B0A2F #3B2E0A #0A3B15

split-complementary

#0A173B #3B150A #2F3B0A

monochromatic

#040A1A #040A1A #0A173B #132B6F #1C40A4

Accessibility & contrast

On white

17.52

#0A173B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#0A173B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A173B

17.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A173B	#FFFFFF	#000000	##FFFFFF
##0A173B	1.00	17.52	1.20	17.52
#FFFFFF	17.52	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#021C3C

Deuteranopia (green-blind)

#00173A

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #0a173b;
/* rgb */ color: rgb(10, 23, 59);
/* oklch */ color: oklch(21.8% 0.072 265.7);

Tailwind

colors: {
  custom: {
    50: '#515371',
    500: '#0a173b',
    950: '#000000',
  },
}

SCSS

$custom: #0a173b;
$custom-light: #515371;
$custom-dark: #000000;

JSON

{
  "hex": "#0a173b",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 59
  },
  "hsl": {
    "h": 224.082,
    "s": 71.014,
    "l": 13.529
  },
  "oklch": {
    "l": 0.21841,
    "c": 0.07193,
    "h": 265.7
  },
  "luminance": 0.00993
}

Semantic roles & 50–950 ramp

primary

#0A173B

secondary

#786328

accent

#BE3AEE

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020207

muted

#78787A

Preview Lab

Preview with #0A173B

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

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