#040B1C#040B1C

#040B1C is a very dark, muted blue. Relative luminance 0.003; OKLCH L 15.3% C 0.039 H 262.5°. Best body text is #FFFFFF at 19.63:1 contrast (WCAG AA passes).

Color values

HEX	#040B1C
RGB	rgb(4, 11, 28)
HSL	hsl(223, 75%, 6%)
HSV	hsv(223, 86%, 11%)
CMYK	cmyk(85.7%, 60.7%, 0%, 89%)
CIE-LAB	lab(3.15, 1.95, -10.81)
CIE-LCH	lch(3.15, 10.98, 280.23°)
OKLab	oklab(15.28% -0.0051 -0.0385)
OKLCH	oklch(15.28% 0.039 262.5)
XYZ	xyz(0.3793, 0.3490, 1.1458)
Luminance	0.0035 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B1C #1C1504

analogous

#04171C #040B1C #09041C

triadic

#040B1C #1C040B #0B1C04

tetradic

#040B1C #1C0417 #1C1504 #041C09

square

#040B1C #1C0417 #1C1504 #041C09

split-complementary

#040B1C #1C0904 #171C04

monochromatic

#040B1B #040B1B #040B1C #0C2052 #133587

Accessibility & contrast

On white

19.63

#040B1C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#040B1C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B1C

19.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B1C	#FFFFFF	#000000	##FFFFFF
##040B1C	1.00	19.63	1.07	19.63
#FFFFFF	19.63	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#040D1D

Deuteranopia (green-blind)

#020A1C

Tritanopia (blue-blind)

#000F12

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #040b1c;
/* rgb */ color: rgb(4, 11, 28);
/* oklch */ color: oklch(15.3% 0.039 262.5);

Tailwind

colors: {
  custom: {
    50: '#484c58',
    500: '#040b1c',
    950: '#000000',
  },
}

SCSS

$custom: #040b1c;
$custom-light: #484c58;
$custom-dark: #000000;

JSON

{
  "hex": "#040b1c",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 28
  },
  "hsl": {
    "h": 222.5,
    "s": 75,
    "l": 6.275
  },
  "oklch": {
    "l": 0.15281,
    "c": 0.03884,
    "h": 262.5
  },
  "luminance": 0.00349
}

Semantic roles & 50–950 ramp

primary

#040B1C

secondary

#5E4B1D

accent

#BB36F2

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000103

muted

#777778

Preview Lab

Preview with #040B1C

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

Preview Lab → · Contrast checker → · Palette generator →