#0C172F#0C172F

#0C172F is a very dark, muted blue. Relative luminance 0.009; OKLCH L 20.9% C 0.050 H 264.0°. Best body text is #FFFFFF at 17.81:1 contrast (WCAG AA passes).

Color values

HEX	#0C172F
RGB	rgb(12, 23, 47)
HSL	hsl(221, 59%, 12%)
HSV	hsv(221, 74%, 18%)
CMYK	cmyk(74.5%, 51.1%, 0%, 81.6%)
CIE-LAB	lab(8.09, 4.63, -17.57)
CIE-LCH	lch(8.09, 18.17, 284.78°)
OKLab	oklab(20.93% -0.0052 -0.05)
OKLCH	oklch(20.93% 0.05 264)
XYZ	xyz(0.9709, 0.8961, 2.8106)
Luminance	0.0090 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0C172F #2F240C

analogous

#0C292F #0C172F #130C2F

triadic

#0C172F #2F0C17 #172F0C

tetradic

#0C172F #2F0C29 #2F240C #0C2F13

square

#0C172F #2F0C29 #2F240C #0C2F13

split-complementary

#0C172F #2F130C #292F0C

monochromatic

#060C18 #060C18 #0C172F #182F60 #254791

Accessibility & contrast

On white

17.81

#0C172F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#0C172F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0C172F

17.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0C172F	#FFFFFF	#000000	##FFFFFF
##0C172F	1.00	17.81	1.18	17.81
#FFFFFF	17.81	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C1930

Deuteranopia (green-blind)

#07162E

Tritanopia (blue-blind)

#001C20

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #0c172f;
/* rgb */ color: rgb(12, 23, 47);
/* oklch */ color: oklch(20.9% 0.050 264.0);

Tailwind

colors: {
  custom: {
    50: '#4f5367',
    500: '#0c172f',
    950: '#000000',
  },
}

SCSS

$custom: #0c172f;
$custom-light: #4f5367;
$custom-dark: #000000;

JSON

{
  "hex": "#0c172f",
  "rgb": {
    "r": 12,
    "g": 23,
    "b": 47
  },
  "hsl": {
    "h": 221.143,
    "s": 59.322,
    "l": 11.569
  },
  "oklch": {
    "l": 0.20926,
    "c": 0.0503,
    "h": 264
  },
  "luminance": 0.00896
}

Semantic roles & 50–950 ramp

primary

#0C172F

secondary

#6B572C

accent

#B145E3

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020206

muted

#78787A

Preview Lab

Preview with #0C172F

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

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