#040D29#040D29

#040D29 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 17.1% C 0.059 H 265.0°. Best body text is #FFFFFF at 19.18:1 contrast (WCAG AA passes).

Color values

HEX	#040D29
RGB	rgb(4, 13, 41)
HSL	hsl(225, 82%, 9%)
HSV	hsv(225, 90%, 16%)
CMYK	cmyk(90.2%, 68.3%, 0%, 83.9%)
CIE-LAB	lab(4.28, 5.89, -19.16)
CIE-LCH	lch(4.28, 20.04, 287.10°)
OKLab	oklab(17.09% -0.0052 -0.0592)
OKLCH	oklch(17.09% 0.059 265)
XYZ	xyz(0.5941, 0.4737, 2.1575)
Luminance	0.0047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.59

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D29 #292004

analogous

#042029 #040D29 #0E0429

triadic

#040D29 #29040D #0D2904

tetradic

#040D29 #290420 #292004 #04290E

square

#040D29 #290420 #292004 #04290E

split-complementary

#040D29 #290E04 #202904

monochromatic

#03091C #03091C #040D29 #091F61 #0F3099

Accessibility & contrast

On white

19.18

#040D29 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040D29 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D29

19.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D29	#FFFFFF	#000000	##FFFFFF
##040D29	1.00	19.18	1.09	19.18
#FFFFFF	19.18	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112A

Deuteranopia (green-blind)

#000D28

Tritanopia (blue-blind)

#001419

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040d29;
/* rgb */ color: rgb(4, 13, 41);
/* oklch */ color: oklch(17.1% 0.059 265.0);

Tailwind

colors: {
  custom: {
    50: '#494c63',
    500: '#040d29',
    950: '#000000',
  },
}

SCSS

$custom: #040d29;
$custom-light: #494c63;
$custom-dark: #000000;

JSON

{
  "hex": "#040d29",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 41
  },
  "hsl": {
    "h": 225.405,
    "s": 82.222,
    "l": 8.824
  },
  "oklch": {
    "l": 0.17088,
    "c": 0.05941,
    "h": 265
  },
  "luminance": 0.00474
}

Semantic roles & 50–950 ramp

primary

#040D29

secondary

#6C591D

accent

#C82FF9

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040D29

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

Preview Lab → · Contrast checker → · Palette generator →