#0A173F#0A173F

#0A173F is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.079 H 266.4°. Best body text is #FFFFFF at 17.40:1 contrast (WCAG AA passes).

Color values

HEX	#0A173F
RGB	rgb(10, 23, 63)
HSL	hsl(225, 73%, 14%)
HSV	hsv(225, 84%, 25%)
CMYK	cmyk(84.1%, 63.5%, 0%, 75.3%)
CIE-LAB	lab(9.29, 11.44, -27.21)
CIE-LCH	lch(9.29, 29.51, 292.81°)
OKLab	oklab(22.22% -0.005 -0.0784)
OKLCH	oklch(22.22% 0.079 266.4)
XYZ	xyz(1.3285, 1.0361, 4.8316)
Luminance	0.0104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A173F #3F320A

analogous

#0A323F #0A173F #180A3F

triadic

#0A173F #3F0A17 #173F0A

tetradic

#0A173F #3F0A32 #3F320A #0A3F18

square

#0A173F #3F0A32 #3F320A #0A3F18

split-complementary

#0A173F #3F180A #323F0A

monochromatic

#040A1A #040A1A #0A173F #122A74 #1B3EA9

Accessibility & contrast

On white

17.40

#0A173F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0A173F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A173F

17.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A173F	#FFFFFF	#000000	##FFFFFF
##0A173F	1.00	17.40	1.21	17.40
#FFFFFF	17.40	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D40

Deuteranopia (green-blind)

#00183E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0a173f;
/* rgb */ color: rgb(10, 23, 63);
/* oklch */ color: oklch(22.2% 0.079 266.4);

Tailwind

colors: {
  custom: {
    50: '#525374',
    500: '#0a173f',
    950: '#000000',
  },
}

SCSS

$custom: #0a173f;
$custom-light: #525374;
$custom-dark: #000000;

JSON

{
  "hex": "#0a173f",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 63
  },
  "hsl": {
    "h": 225.283,
    "s": 72.603,
    "l": 14.314
  },
  "oklch": {
    "l": 0.22222,
    "c": 0.07858,
    "h": 266.4
  },
  "luminance": 0.01036
}

Semantic roles & 50–950 ramp

primary

#0A173F

secondary

#7C6829

accent

#C238EF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A173F

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

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