#0A172F#0A172F

#0A172F is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.8% C 0.051 H 261.6°. Best body text is #FFFFFF at 17.85:1 contrast (WCAG AA passes).

Color values

HEX	#0A172F
RGB	rgb(10, 23, 47)
HSL	hsl(219, 65%, 11%)
HSV	hsv(219, 79%, 18%)
CMYK	cmyk(78.7%, 51.1%, 0%, 81.6%)
CIE-LAB	lab(7.97, 4.17, -17.77)
CIE-LCH	lch(7.97, 18.25, 283.21°)
OKLab	oklab(20.8% -0.0075 -0.0507)
OKLCH	oklch(20.8% 0.051 261.6)
XYZ	xyz(0.9445, 0.8825, 2.8093)
Luminance	0.0088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A172F #2F220A

analogous

#0A292F #0A172F #0F0A2F

triadic

#0A172F #2F0A17 #172F0A

tetradic

#0A172F #2F0A29 #2F220A #0A2F0F

square

#0A172F #2F0A29 #2F220A #0A2F0F

split-complementary

#0A172F #2F0F0A #292F0A

monochromatic

#050C19 #050C19 #0A172F #153061 #1F4894

Accessibility & contrast

On white

17.85

#0A172F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#0A172F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A172F

17.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A172F	#FFFFFF	#000000	##FFFFFF
##0A172F	1.00	17.85	1.18	17.85
#FFFFFF	17.85	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C1930

Deuteranopia (green-blind)

#07162F

Tritanopia (blue-blind)

#001C20

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #0a172f;
/* rgb */ color: rgb(10, 23, 47);
/* oklch */ color: oklch(20.8% 0.051 261.6);

Tailwind

colors: {
  custom: {
    50: '#4e5367',
    500: '#0a172f',
    950: '#000000',
  },
}

SCSS

$custom: #0a172f;
$custom-light: #4e5367;
$custom-dark: #000000;

JSON

{
  "hex": "#0a172f",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 47
  },
  "hsl": {
    "h": 218.919,
    "s": 64.912,
    "l": 11.176
  },
  "oklch": {
    "l": 0.20797,
    "c": 0.05122,
    "h": 261.6
  },
  "luminance": 0.00883
}

Semantic roles & 50–950 ramp

primary

#0A172F

secondary

#6C5429

accent

#AD40E8

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020206

muted

#78787A

Preview Lab

Preview with #0A172F

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

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