#040A19#040A19

#040A19 is a very dark, muted blue. Relative luminance 0.003; OKLCH L 14.7% C 0.035 H 262.6°. Best body text is #FFFFFF at 19.76:1 contrast (WCAG AA passes).

Color values

HEX	#040A19
RGB	rgb(4, 10, 25)
HSL	hsl(223, 72%, 6%)
HSV	hsv(223, 84%, 10%)
CMYK	cmyk(84%, 60%, 0%, 90.2%)
CIE-LAB	lab(2.83, 1.49, -8.89)
CIE-LCH	lch(2.83, 9.01, 279.53°)
OKLab	oklab(14.72% -0.0045 -0.0344)
OKLCH	oklch(14.72% 0.035 262.6)
XYZ	xyz(0.3340, 0.3131, 0.9623)
Luminance	0.0031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A19 #191304

analogous

#041419 #040A19 #080419

triadic

#040A19 #19040A #0A1904

tetradic

#040A19 #190414 #191304 #041908

square

#040A19 #190414 #191304 #041908

split-complementary

#040A19 #190804 #141904

monochromatic

#040B1A #040B1A #040B1A #0C1F4E #153483

Accessibility & contrast

On white

19.76

#040A19 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040A19 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A19

19.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A19	#FFFFFF	#000000	##FFFFFF
##040A19	1.00	19.76	1.06	19.76
#FFFFFF	19.76	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#050B1A

Deuteranopia (green-blind)

#030919

Tritanopia (blue-blind)

#000D10

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #040a19;
/* rgb */ color: rgb(4, 10, 25);
/* oklch */ color: oklch(14.7% 0.035 262.6);

Tailwind

colors: {
  custom: {
    50: '#484b55',
    500: '#040a19',
    950: '#000000',
  },
}

SCSS

$custom: #040a19;
$custom-light: #484b55;
$custom-dark: #000000;

JSON

{
  "hex": "#040a19",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 25
  },
  "hsl": {
    "h": 222.857,
    "s": 72.414,
    "l": 5.686
  },
  "oklch": {
    "l": 0.14722,
    "c": 0.03472,
    "h": 262.6
  },
  "luminance": 0.00313
}

Semantic roles & 50–950 ramp

primary

#040A19

secondary

#5B4A1E

accent

#BB39EF

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000103

muted

#777778

Preview Lab

Preview with #040A19

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

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