#040B16#040B16

#040B16 is a very dark, muted blue. Relative luminance 0.003; OKLCH L 14.8% C 0.027 H 255.2°. Best body text is #FFFFFF at 19.73:1 contrast (WCAG AA passes).

Color values

HEX	#040B16
RGB	rgb(4, 11, 22)
HSL	hsl(217, 69%, 5%)
HSV	hsv(217, 82%, 9%)
CMYK	cmyk(81.8%, 50%, 0%, 91.4%)
CIE-LAB	lab(2.92, 0.30, -6.48)
CIE-LCH	lch(2.92, 6.49, 272.68°)
OKLab	oklab(14.79% -0.007 -0.0265)
OKLCH	oklch(14.79% 0.027 255.2)
XYZ	xyz(0.3145, 0.3231, 0.8047)
Luminance	0.0032 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B16 #160F04

analogous

#041416 #040B16 #060416

triadic

#040B16 #16040B #0B1604

tetradic

#040B16 #160414 #160F04 #041606

square

#040B16 #160414 #160F04 #041606

split-complementary

#040B16 #160604 #141604

monochromatic

#050D1A #050D1A #050D1A #0D254A #173F7E

Accessibility & contrast

On white

19.73

#040B16 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040B16 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B16

19.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B16	#FFFFFF	#000000	##FFFFFF
##040B16	1.00	19.73	1.06	19.73
#FFFFFF	19.73	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#070C16

Deuteranopia (green-blind)

#050A16

Tritanopia (blue-blind)

#000D0F

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #040b16;
/* rgb */ color: rgb(4, 11, 22);
/* oklch */ color: oklch(14.8% 0.027 255.2);

Tailwind

colors: {
  custom: {
    50: '#484c52',
    500: '#040b16',
    950: '#000000',
  },
}

SCSS

$custom: #040b16;
$custom-light: #484c52;
$custom-dark: #000000;

JSON

{
  "hex": "#040b16",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 22
  },
  "hsl": {
    "h": 216.667,
    "s": 69.231,
    "l": 5.098
  },
  "oklch": {
    "l": 0.14789,
    "c": 0.02742,
    "h": 255.2
  },
  "luminance": 0.00323
}

Semantic roles & 50–950 ramp

primary

#040B16

secondary

#57411E

accent

#A73CEC

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000102

muted

#777778

Preview Lab

Preview with #040B16

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

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