#040A28#040A28

#040A28 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.2% C 0.062 H 267.8°. Best body text is #FFFFFF at 19.46:1 contrast (WCAG AA passes).

Color values

HEX	#040A28
RGB	rgb(4, 10, 40)
HSL	hsl(230, 82%, 9%)
HSV	hsv(230, 90%, 16%)
CMYK	cmyk(90%, 75%, 0%, 84.3%)
CIE-LAB	lab(3.58, 6.76, -19.50)
CIE-LCH	lch(3.58, 20.64, 289.13°)
OKLab	oklab(16.21% -0.0024 -0.0624)
OKLCH	oklch(16.21% 0.062 267.8)
XYZ	xyz(0.5415, 0.3960, 2.0550)
Luminance	0.0040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.18

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A28 #282204

analogous

#041C28 #040A28 #100428

triadic

#040A28 #28040A #0A2804

tetradic

#040A28 #28041C #282204 #042810

square

#040A28 #28041C #282204 #042810

split-complementary

#040A28 #281004 #1C2804

monochromatic

#03071C #03071C #040A28 #0A1860 #0F2697

Accessibility & contrast

On white

19.46

#040A28 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040A28 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A28

19.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A28	#FFFFFF	#000000	##FFFFFF
##040A28	1.00	19.46	1.08	19.46
#FFFFFF	19.46	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F29

Deuteranopia (green-blind)

#000B27

Tritanopia (blue-blind)

#001217

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040a28;
/* rgb */ color: rgb(4, 10, 40);
/* oklch */ color: oklch(16.2% 0.062 267.8);

Tailwind

colors: {
  custom: {
    50: '#494b62',
    500: '#040a28',
    950: '#000000',
  },
}

SCSS

$custom: #040a28;
$custom-light: #494b62;
$custom-dark: #000000;

JSON

{
  "hex": "#040a28",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 40
  },
  "hsl": {
    "h": 230,
    "s": 81.818,
    "l": 8.627
  },
  "oklch": {
    "l": 0.1621,
    "c": 0.06244,
    "h": 267.8
  },
  "luminance": 0.00396
}

Semantic roles & 50–950 ramp

primary

#040A28

secondary

#6B5E1D

accent

#D730F8

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040A28

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

Preview Lab → · Contrast checker → · Palette generator →