#040D2A#040D2A

#040D2A is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.2% C 0.061 H 265.2°. Best body text is #FFFFFF at 19.16:1 contrast (WCAG AA passes).

Color values

HEX	#040D2A
RGB	rgb(4, 13, 42)
HSL	hsl(226, 83%, 9%)
HSV	hsv(226, 90%, 16%)
CMYK	cmyk(90.5%, 69%, 0%, 83.5%)
CIE-LAB	lab(4.34, 6.34, -19.81)
CIE-LCH	lch(4.34, 20.80, 287.75°)
OKLab	oklab(17.19% -0.0051 -0.0609)
OKLCH	oklch(17.19% 0.061 265.2)
XYZ	xyz(0.6118, 0.4808, 2.2506)
Luminance	0.0048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.23

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D2A #2A2104

analogous

#04202A #040D2A #0E042A

triadic

#040D2A #2A040D #0D2A04

tetradic

#040D2A #2A0420 #2A2104 #042A0E

square

#040D2A #2A0420 #2A2104 #042A0E

split-complementary

#040D2A #2A0E04 #202A04

monochromatic

#03091C #03091C #040D2A #091E62 #0F309A

Accessibility & contrast

On white

19.16

#040D2A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040D2A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D2A

19.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D2A	#FFFFFF	#000000	##FFFFFF
##040D2A	1.00	19.16	1.10	19.16
#FFFFFF	19.16	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112B

Deuteranopia (green-blind)

#000D29

Tritanopia (blue-blind)

#001419

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040d2a;
/* rgb */ color: rgb(4, 13, 42);
/* oklch */ color: oklch(17.2% 0.061 265.2);

Tailwind

colors: {
  custom: {
    50: '#494c63',
    500: '#040d2a',
    950: '#000000',
  },
}

SCSS

$custom: #040d2a;
$custom-light: #494c63;
$custom-dark: #000000;

JSON

{
  "hex": "#040d2a",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 42
  },
  "hsl": {
    "h": 225.789,
    "s": 82.609,
    "l": 9.02
  },
  "oklch": {
    "l": 0.17191,
    "c": 0.06115,
    "h": 265.2
  },
  "luminance": 0.00481
}

Semantic roles & 50–950 ramp

primary

#040D2A

secondary

#6D5A1D

accent

#C92FF9

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040D2A

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

Preview Lab → · Contrast checker → · Palette generator →