#040C19#040C19

#040C19 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 15.3% C 0.032 H 256.4°. Best body text is #FFFFFF at 19.59:1 contrast (WCAG AA passes).

Color values

HEX	#040C19
RGB	rgb(4, 12, 25)
HSL	hsl(217, 72%, 6%)
HSV	hsv(217, 84%, 10%)
CMYK	cmyk(84%, 52%, 0%, 90.2%)
CIE-LAB	lab(3.24, 0.65, -8.28)
CIE-LCH	lch(3.24, 8.31, 274.46°)
OKLab	oklab(15.34% -0.0074 -0.0307)
OKLCH	oklch(15.34% 0.032 256.4)
XYZ	xyz(0.3569, 0.3589, 0.9700)
Luminance	0.0036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C19 #191104

analogous

#041619 #040C19 #060419

triadic

#040C19 #19040C #0C1904

tetradic

#040C19 #190416 #191104 #041906

square

#040C19 #190416 #191104 #041906

split-complementary

#040C19 #190604 #161904

monochromatic

#040D1A #040D1A #040D1A #0C254E #153F83

Accessibility & contrast

On white

19.59

#040C19 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#040C19 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C19

19.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C19	#FFFFFF	#000000	##FFFFFF
##040C19	1.00	19.59	1.07	19.59
#FFFFFF	19.59	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#070D1A

Deuteranopia (green-blind)

#050B19

Tritanopia (blue-blind)

#000F11

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #040c19;
/* rgb */ color: rgb(4, 12, 25);
/* oklch */ color: oklch(15.3% 0.032 256.4);

Tailwind

colors: {
  custom: {
    50: '#484c55',
    500: '#040c19',
    950: '#000000',
  },
}

SCSS

$custom: #040c19;
$custom-light: #484c55;
$custom-dark: #000000;

JSON

{
  "hex": "#040c19",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 25
  },
  "hsl": {
    "h": 217.143,
    "s": 72.414,
    "l": 5.686
  },
  "oklch": {
    "l": 0.15336,
    "c": 0.03161,
    "h": 256.4
  },
  "luminance": 0.00359
}

Semantic roles & 50–950 ramp

primary

#040C19

secondary

#5B441E

accent

#AA39EF

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000103

muted

#777778

Preview Lab

Preview with #040C19

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

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