#040D28#040D28

#040D28 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 17.0% C 0.058 H 264.7°. Best body text is #FFFFFF at 19.21:1 contrast (WCAG AA passes).

Color values

HEX	#040D28
RGB	rgb(4, 13, 40)
HSL	hsl(225, 82%, 9%)
HSV	hsv(225, 90%, 16%)
CMYK	cmyk(90%, 67.5%, 0%, 84.3%)
CIE-LAB	lab(4.22, 5.46, -18.49)
CIE-LCH	lch(4.22, 19.28, 286.44°)
OKLab	oklab(16.99% -0.0053 -0.0574)
OKLCH	oklch(16.99% 0.058 264.7)
XYZ	xyz(0.5769, 0.4668, 2.0668)
Luminance	0.0047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.95

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D28 #281F04

analogous

#041F28 #040D28 #0D0428

triadic

#040D28 #28040D #0D2804

tetradic

#040D28 #28041F #281F04 #04280D

square

#040D28 #28041F #281F04 #04280D

split-complementary

#040D28 #280D04 #1F2804

monochromatic

#03091C #03091C #040D28 #0A1F60 #0F3197

Accessibility & contrast

On white

19.21

#040D28 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040D28 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D28

19.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D28	#FFFFFF	#000000	##FFFFFF
##040D28	1.00	19.21	1.09	19.21
#FFFFFF	19.21	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001129

Deuteranopia (green-blind)

#000D27

Tritanopia (blue-blind)

#001418

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040d28;
/* rgb */ color: rgb(4, 13, 40);
/* oklch */ color: oklch(17.0% 0.058 264.7);

Tailwind

colors: {
  custom: {
    50: '#494c62',
    500: '#040d28',
    950: '#000000',
  },
}

SCSS

$custom: #040d28;
$custom-light: #494c62;
$custom-dark: #000000;

JSON

{
  "hex": "#040d28",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 40
  },
  "hsl": {
    "h": 225,
    "s": 81.818,
    "l": 8.627
  },
  "oklch": {
    "l": 0.16986,
    "c": 0.05764,
    "h": 264.7
  },
  "luminance": 0.00467
}

Semantic roles & 50–950 ramp

primary

#040D28

secondary

#6B571D

accent

#C630F8

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040D28

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

Preview Lab → · Contrast checker → · Palette generator →