#040F29#040F29

#040F29 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 17.6% C 0.056 H 262.6°. Best body text is #FFFFFF at 18.99:1 contrast (WCAG AA passes).

Color values

HEX	#040F29
RGB	rgb(4, 15, 41)
HSL	hsl(222, 82%, 9%)
HSV	hsv(222, 90%, 16%)
CMYK	cmyk(90.2%, 63.4%, 0%, 83.9%)
CIE-LAB	lab(4.76, 4.90, -18.39)
CIE-LCH	lch(4.76, 19.04, 284.92°)
OKLab	oklab(17.63% -0.0072 -0.0557)
OKLCH	oklch(17.63% 0.056 262.6)
XYZ	xyz(0.6210, 0.5275, 2.1665)
Luminance	0.0053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.19

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F29 #291E04

analogous

#042229 #040F29 #0C0429

triadic

#040F29 #29040F #0F2904

tetradic

#040F29 #290422 #291E04 #04290C

square

#040F29 #290422 #291E04 #04290C

split-complementary

#040F29 #290C04 #222904

monochromatic

#030A1C #030A1C #040F29 #092361 #0F3899

Accessibility & contrast

On white

18.99

#040F29 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040F29 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F29

18.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F29	#FFFFFF	#000000	##FFFFFF
##040F29	1.00	18.99	1.11	18.99
#FFFFFF	18.99	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02122A

Deuteranopia (green-blind)

#000F28

Tritanopia (blue-blind)

#00151A

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040f29;
/* rgb */ color: rgb(4, 15, 41);
/* oklch */ color: oklch(17.6% 0.056 262.6);

Tailwind

colors: {
  custom: {
    50: '#494e63',
    500: '#040f29',
    950: '#000000',
  },
}

SCSS

$custom: #040f29;
$custom-light: #494e63;
$custom-dark: #000000;

JSON

{
  "hex": "#040f29",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 41
  },
  "hsl": {
    "h": 222.162,
    "s": 82.222,
    "l": 8.824
  },
  "oklch": {
    "l": 0.17628,
    "c": 0.05621,
    "h": 262.6
  },
  "luminance": 0.00528
}

Semantic roles & 50–950 ramp

primary

#040F29

secondary

#6C541D

accent

#BD2FF9

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040F29

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

Preview Lab → · Contrast checker → · Palette generator →