#040F28#040F28

#040F28 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 17.5% C 0.054 H 262.2°. Best body text is #FFFFFF at 19.02:1 contrast (WCAG AA passes).

Color values

HEX	#040F28
RGB	rgb(4, 15, 40)
HSL	hsl(222, 82%, 9%)
HSV	hsv(222, 90%, 16%)
CMYK	cmyk(90%, 62.5%, 0%, 84.3%)
CIE-LAB	lab(4.70, 4.46, -17.73)
CIE-LCH	lch(4.70, 18.29, 284.13°)
OKLab	oklab(17.53% -0.0074 -0.0539)
OKLCH	oklch(17.53% 0.054 262.2)
XYZ	xyz(0.6038, 0.5206, 2.0757)
Luminance	0.0052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.55

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F28 #281D04

analogous

#042128 #040F28 #0B0428

triadic

#040F28 #28040F #0F2804

tetradic

#040F28 #280421 #281D04 #04280B

square

#040F28 #280421 #281D04 #04280B

split-complementary

#040F28 #280B04 #212804

monochromatic

#030A1C #030A1C #040F28 #0A2460 #0F3997

Accessibility & contrast

On white

19.02

#040F28 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040F28 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F28

19.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F28	#FFFFFF	#000000	##FFFFFF
##040F28	1.00	19.02	1.10	19.02
#FFFFFF	19.02	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031229

Deuteranopia (green-blind)

#000E27

Tritanopia (blue-blind)

#001519

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040f28;
/* rgb */ color: rgb(4, 15, 40);
/* oklch */ color: oklch(17.5% 0.054 262.2);

Tailwind

colors: {
  custom: {
    50: '#494e62',
    500: '#040f28',
    950: '#000000',
  },
}

SCSS

$custom: #040f28;
$custom-light: #494e62;
$custom-dark: #000000;

JSON

{
  "hex": "#040f28",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 40
  },
  "hsl": {
    "h": 221.667,
    "s": 81.818,
    "l": 8.627
  },
  "oklch": {
    "l": 0.17532,
    "c": 0.05443,
    "h": 262.2
  },
  "luminance": 0.00521
}

Semantic roles & 50–950 ramp

primary

#040F28

secondary

#6B531D

accent

#BB30F8

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040F28

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

Preview Lab → · Contrast checker → · Palette generator →