#040D19#040D19

#040D19 is a very dark, muted cyan. Relative luminance 0.004; OKLCH L 15.7% C 0.030 H 252.8°. Best body text is #FFFFFF at 19.50:1 contrast (WCAG AA passes).

Color values

HEX	#040D19
RGB	rgb(4, 13, 25)
HSL	hsl(214, 72%, 6%)
HSV	hsv(214, 84%, 10%)
CMYK	cmyk(84%, 48%, 0%, 90.2%)
CIE-LAB	lab(3.47, 0.19, -7.96)
CIE-LCH	lch(3.47, 7.96, 271.36°)
OKLab	oklab(15.65% -0.0089 -0.0289)
OKLCH	oklch(15.65% 0.03 252.8)
XYZ	xyz(0.3694, 0.3838, 0.9741)
Luminance	0.0038 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D19 #191004

analogous

#041719 #040D19 #050419

triadic

#040D19 #19040D #0D1904

tetradic

#040D19 #190417 #191004 #041905

square

#040D19 #190417 #191004 #041905

split-complementary

#040D19 #190504 #171904

monochromatic

#040E1A #040E1A #040E1A #0C284E #154483

Accessibility & contrast

On white

19.50

#040D19 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040D19 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D19

19.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D19	#FFFFFF	#000000	##FFFFFF
##040D19	1.00	19.50	1.08	19.50
#FFFFFF	19.50	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#080E1A

Deuteranopia (green-blind)

#060B19

Tritanopia (blue-blind)

#001011

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #040d19;
/* rgb */ color: rgb(4, 13, 25);
/* oklch */ color: oklch(15.7% 0.030 252.8);

Tailwind

colors: {
  custom: {
    50: '#484d55',
    500: '#040d19',
    950: '#000000',
  },
}

SCSS

$custom: #040d19;
$custom-light: #484d55;
$custom-dark: #000000;

JSON

{
  "hex": "#040d19",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 25
  },
  "hsl": {
    "h": 214.286,
    "s": 72.414,
    "l": 5.686
  },
  "oklch": {
    "l": 0.1565,
    "c": 0.03021,
    "h": 252.8
  },
  "luminance": 0.00384
}

Semantic roles & 50–950 ramp

primary

#040D19

secondary

#5B411E

accent

#A139EF

background

#F4F4F4

surface

#E6E7E7

border

#C2C3C3

text

#000103

muted

#777778

Preview Lab

Preview with #040D19

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

Preview Lab → · Contrast checker → · Palette generator →