#0A173C#0A173C

#0A173C is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.9% C 0.074 H 265.9°. Best body text is #FFFFFF at 17.49:1 contrast (WCAG AA passes).

Color values

HEX	#0A173C
RGB	rgb(10, 23, 60)
HSL	hsl(224, 71%, 14%)
HSV	hsv(224, 83%, 24%)
CMYK	cmyk(83.3%, 61.7%, 0%, 76.5%)
CIE-LAB	lab(9.02, 10.08, -25.51)
CIE-LCH	lch(9.02, 27.43, 291.56°)
OKLab	oklab(21.94% -0.0053 -0.0734)
OKLCH	oklch(21.94% 0.074 265.9)
XYZ	xyz(1.2469, 1.0034, 4.4021)
Luminance	0.0100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A173C #3C2F0A

analogous

#0A303C #0A173C #160A3C

triadic

#0A173C #3C0A17 #173C0A

tetradic

#0A173C #3C0A30 #3C2F0A #0A3C16

square

#0A173C #3C0A30 #3C2F0A #0A3C16

split-complementary

#0A173C #3C160A #303C0A

monochromatic

#040A1A #040A1A #0A173C #132B70 #1B3FA5

Accessibility & contrast

On white

17.49

#0A173C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#0A173C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A173C

17.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A173C	#FFFFFF	#000000	##FFFFFF
##0A173C	1.00	17.49	1.20	17.49
#FFFFFF	17.49	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#011C3D

Deuteranopia (green-blind)

#00173B

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0a173c;
/* rgb */ color: rgb(10, 23, 60);
/* oklch */ color: oklch(21.9% 0.074 265.9);

Tailwind

colors: {
  custom: {
    50: '#515372',
    500: '#0a173c',
    950: '#000000',
  },
}

SCSS

$custom: #0a173c;
$custom-light: #515372;
$custom-dark: #000000;

JSON

{
  "hex": "#0a173c",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 60
  },
  "hsl": {
    "h": 224.4,
    "s": 71.429,
    "l": 13.725
  },
  "oklch": {
    "l": 0.21935,
    "c": 0.07361,
    "h": 265.9
  },
  "luminance": 0.01004
}

Semantic roles & 50–950 ramp

primary

#0A173C

secondary

#796428

accent

#BF3AEE

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020208

muted

#78787B

Preview Lab

Preview with #0A173C

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

Preview Lab → · Contrast checker → · Palette generator →