#0A172B#0A172B

#0A172B is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.5% C 0.044 H 258.7°. Best body text is #FFFFFF at 17.94:1 contrast (WCAG AA passes).

Color values

HEX	#0A172B
RGB	rgb(10, 23, 43)
HSL	hsl(216, 62%, 10%)
HSV	hsv(216, 77%, 17%)
CMYK	cmyk(76.7%, 46.5%, 0%, 83.1%)
CIE-LAB	lab(7.69, 2.36, -15.25)
CIE-LCH	lch(7.69, 15.44, 278.81°)
OKLab	oklab(20.49% -0.0086 -0.0433)
OKLCH	oklch(20.49% 0.044 258.7)
XYZ	xyz(0.8675, 0.8517, 2.4037)
Luminance	0.0085 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A172B #2B1E0A

analogous

#0A272B #0A172B #0E0A2B

triadic

#0A172B #2B0A17 #172B0A

tetradic

#0A172B #2B0A27 #2B1E0A #0A2B0E

square

#0A172B #2B0A27 #2B1E0A #0A2B0E

split-complementary

#0A172B #2B0E0A #272B0A

monochromatic

#060D19 #060D19 #0A172B #16325D #214C8E

Accessibility & contrast

On white

17.94

#0A172B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#0A172B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A172B

17.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A172B	#FFFFFF	#000000	##FFFFFF
##0A172B	1.00	17.94	1.17	17.94
#FFFFFF	17.94	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E192C

Deuteranopia (green-blind)

#0A152B

Tritanopia (blue-blind)

#001C1E

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #0a172b;
/* rgb */ color: rgb(10, 23, 43);
/* oklch */ color: oklch(20.5% 0.044 258.7);

Tailwind

colors: {
  custom: {
    50: '#4d5364',
    500: '#0a172b',
    950: '#000000',
  },
}

SCSS

$custom: #0a172b;
$custom-light: #4d5364;
$custom-dark: #000000;

JSON

{
  "hex": "#0a172b",
  "rgb": {
    "r": 10,
    "g": 23,
    "b": 43
  },
  "hsl": {
    "h": 216.364,
    "s": 62.264,
    "l": 10.392
  },
  "oklch": {
    "l": 0.20487,
    "c": 0.04417,
    "h": 258.7
  },
  "luminance": 0.00852
}

Semantic roles & 50–950 ramp

primary

#0A172B

secondary

#684F29

accent

#A542E5

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010205

muted

#77787A

Preview Lab

Preview with #0A172B

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

Preview Lab → · Contrast checker → · Palette generator →