#040E23#040E23

#040E23 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 16.8% C 0.047 H 261.1°. Best body text is #FFFFFF at 19.23:1 contrast (WCAG AA passes).

Color values

HEX	#040E23
RGB	rgb(4, 14, 35)
HSL	hsl(221, 79%, 8%)
HSV	hsv(221, 89%, 14%)
CMYK	cmyk(88.6%, 60%, 0%, 86.3%)
CIE-LAB	lab(4.17, 2.95, -14.74)
CIE-LCH	lch(4.17, 15.03, 281.32°)
OKLab	oklab(16.79% -0.0072 -0.0465)
OKLCH	oklch(16.79% 0.047 261.1)
XYZ	xyz(0.5104, 0.4612, 1.6519)
Luminance	0.0046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040E23 #231904

analogous

#041D23 #040E23 #090423

triadic

#040E23 #23040E #0E2304

tetradic

#040E23 #23041D #231904 #042309

square

#040E23 #23041D #231904 #042309

split-complementary

#040E23 #230904 #1D2304

monochromatic

#030B1B #030B1B #040E23 #0A245A #113A91

Accessibility & contrast

On white

19.23

#040E23 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040E23 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040E23

19.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040E23	#FFFFFF	#000000	##FFFFFF
##040E23	1.00	19.23	1.09	19.23
#FFFFFF	19.23	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041024

Deuteranopia (green-blind)

#010D23

Tritanopia (blue-blind)

#001316

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040e23;
/* rgb */ color: rgb(4, 14, 35);
/* oklch */ color: oklch(16.8% 0.047 261.1);

Tailwind

colors: {
  custom: {
    50: '#484d5e',
    500: '#040e23',
    950: '#000000',
  },
}

SCSS

$custom: #040e23;
$custom-light: #484d5e;
$custom-dark: #000000;

JSON

{
  "hex": "#040e23",
  "rgb": {
    "r": 4,
    "g": 14,
    "b": 35
  },
  "hsl": {
    "h": 220.645,
    "s": 79.487,
    "l": 7.647
  },
  "oklch": {
    "l": 0.16785,
    "c": 0.04703,
    "h": 261.1
  },
  "luminance": 0.00461
}

Semantic roles & 50–950 ramp

primary

#040E23

secondary

#664E1D

accent

#B732F6

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000104

muted

#777779

Preview Lab

Preview with #040E23

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

Preview Lab → · Contrast checker → · Palette generator →