#040D2D#040D2D

#040D2D is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.5% C 0.066 H 265.8°. Best body text is #FFFFFF at 19.08:1 contrast (WCAG AA passes).

Color values

HEX	#040D2D
RGB	rgb(4, 13, 45)
HSL	hsl(227, 84%, 10%)
HSV	hsv(227, 91%, 18%)
CMYK	cmyk(91.1%, 71.1%, 0%, 82.4%)
CIE-LAB	lab(4.54, 7.76, -21.76)
CIE-LCH	lch(4.54, 23.10, 289.63°)
OKLab	oklab(17.51% -0.0049 -0.0662)
OKLCH	oklch(17.51% 0.066 265.8)
XYZ	xyz(0.6675, 0.5030, 2.5440)
Luminance	0.0050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.23

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D2D #2D2404

analogous

#04222D #040D2D #10042D

triadic

#040D2D #2D040D #0D2D04

tetradic

#040D2D #2D0422 #2D2404 #042D10

square

#040D2D #2D0422 #2D2404 #042D10

split-complementary

#040D2D #2D1004 #222D04

monochromatic

#02081C #02081C #040D2D #091D65 #0E2D9D

Accessibility & contrast

On white

19.08

#040D2D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040D2D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D2D

19.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D2D	#FFFFFF	#000000	##FFFFFF
##040D2D	1.00	19.08	1.10	19.08
#FFFFFF	19.08	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00122E

Deuteranopia (green-blind)

#000E2C

Tritanopia (blue-blind)

#00151B

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040d2d;
/* rgb */ color: rgb(4, 13, 45);
/* oklch */ color: oklch(17.5% 0.066 265.8);

Tailwind

colors: {
  custom: {
    50: '#4a4c66',
    500: '#040d2d',
    950: '#000000',
  },
}

SCSS

$custom: #040d2d;
$custom-light: #4a4c66;
$custom-dark: #000000;

JSON

{
  "hex": "#040d2d",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 45
  },
  "hsl": {
    "h": 226.829,
    "s": 83.673,
    "l": 9.608
  },
  "oklch": {
    "l": 0.17508,
    "c": 0.06634,
    "h": 265.8
  },
  "luminance": 0.00503
}

Semantic roles & 50–950 ramp

primary

#040D2D

secondary

#705E1D

accent

#CD2EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040D2D

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

Preview Lab → · Contrast checker → · Palette generator →