#0A173E#0A173E

#0A173E is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.1% C 0.077 H 266.2°. Best body text is #FFFFFF at 17.43:1 contrast (WCAG AA passes).

Color values

HEX	#0A173E
RGB	rgb(10, 23, 62)
HSL	hsl(225, 72%, 14%)
HSV	hsv(225, 84%, 24%)
CMYK	cmyk(83.9%, 62.9%, 0%, 75.7%)
CIE-LAB	lab(9.20, 10.99, -26.64)
CIE-LCH	lch(9.20, 28.82, 292.41°)
OKLab	oklab(22.13% -0.0051 -0.0768)
OKLCH	oklch(22.13% 0.077 266.2)
XYZ	xyz(1.3008, 1.0250, 4.6858)
Luminance	0.0103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A173E #3E310A

analogous

#0A313E #0A173E #170A3E

triadic

#0A173E #3E0A17 #173E0A

tetradic

#0A173E #3E0A31 #3E310A #0A3E17

square

#0A173E #3E0A31 #3E310A #0A3E17

split-complementary

#0A173E #3E170A #313E0A

monochromatic

#040A1A #040A1A #0A173E #132B73 #1B3EA7

Accessibility & contrast

On white

17.43

#0A173E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0A173E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A173E

17.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A173E	#FFFFFF	#000000	##FFFFFF
##0A173E	1.00	17.43	1.21	17.43
#FFFFFF	17.43	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C3F

Deuteranopia (green-blind)

#00183D

Tritanopia (blue-blind)

#002127

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0a173e;
/* rgb */ color: rgb(10, 23, 62);
/* oklch */ color: oklch(22.1% 0.077 266.2);

Tailwind

colors: {
  custom: {
    50: '#525374',
    500: '#0a173e',
    950: '#000000',
  },
}

SCSS

$custom: #0a173e;
$custom-light: #525374;
$custom-dark: #000000;

JSON

{
  "hex": "#0a173e",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 62
  },
  "hsl": {
    "h": 225,
    "s": 72.222,
    "l": 14.118
  },
  "oklch": {
    "l": 0.22125,
    "c": 0.07694,
    "h": 266.2
  },
  "luminance": 0.01025
}

Semantic roles & 50–950 ramp

primary

#0A173E

secondary

#7B6728

accent

#C139EF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A173E

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

Preview Lab → · Contrast checker → · Palette generator →