#0A172C#0A172C

#0A172C is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.6% C 0.046 H 259.6°. Best body text is #FFFFFF at 17.92:1 contrast (WCAG AA passes).

Color values

HEX	#0A172C
RGB	rgb(10, 23, 44)
HSL	hsl(217, 63%, 11%)
HSV	hsv(217, 77%, 17%)
CMYK	cmyk(77.3%, 47.7%, 0%, 82.7%)
CIE-LAB	lab(7.76, 2.81, -15.89)
CIE-LCH	lch(7.76, 16.14, 280.04°)
OKLab	oklab(20.56% -0.0083 -0.0452)
OKLCH	oklch(20.56% 0.046 259.6)
XYZ	xyz(0.8860, 0.8591, 2.5015)
Luminance	0.0086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A172C #2C1F0A

analogous

#0A282C #0A172C #0E0A2C

triadic

#0A172C #2C0A17 #172C0A

tetradic

#0A172C #2C0A28 #2C1F0A #0A2C0E

square

#0A172C #2C0A28 #2C1F0A #0A2C0E

split-complementary

#0A172C #2C0E0A #282C0A

monochromatic

#060D19 #060D19 #0A172C #15315E #214B90

Accessibility & contrast

On white

17.92

#0A172C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#0A172C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A172C

17.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A172C	#FFFFFF	#000000	##FFFFFF
##0A172C	1.00	17.92	1.17	17.92
#FFFFFF	17.92	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E192D

Deuteranopia (green-blind)

#09162C

Tritanopia (blue-blind)

#001C1F

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #0a172c;
/* rgb */ color: rgb(10, 23, 44);
/* oklch */ color: oklch(20.6% 0.046 259.6);

Tailwind

colors: {
  custom: {
    50: '#4d5365',
    500: '#0a172c',
    950: '#000000',
  },
}

SCSS

$custom: #0a172c;
$custom-light: #4d5365;
$custom-dark: #000000;

JSON

{
  "hex": "#0a172c",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 44
  },
  "hsl": {
    "h": 217.059,
    "s": 62.963,
    "l": 10.588
  },
  "oklch": {
    "l": 0.20563,
    "c": 0.04593,
    "h": 259.6
  },
  "luminance": 0.00859
}

Semantic roles & 50–950 ramp

primary

#0A172C

secondary

#695029

accent

#A742E6

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010205

muted

#77787A

Preview Lab

Preview with #0A172C

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

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