#040A29#040A29

#040A29 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.3% C 0.064 H 267.8°. Best body text is #FFFFFF at 19.43:1 contrast (WCAG AA passes).

Color values

HEX	#040A29
RGB	rgb(4, 10, 41)
HSL	hsl(230, 82%, 9%)
HSV	hsv(230, 90%, 16%)
CMYK	cmyk(90.2%, 75.6%, 0%, 83.9%)
CIE-LAB	lab(3.64, 7.20, -20.16)
CIE-LCH	lch(3.64, 21.41, 289.65°)
OKLab	oklab(16.32% -0.0024 -0.0641)
OKLCH	oklch(16.32% 0.064 267.8)
XYZ	xyz(0.5587, 0.4029, 2.1457)
Luminance	0.0040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.82

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A29 #292304

analogous

#041D29 #040A29 #110429

triadic

#040A29 #29040A #0A2904

tetradic

#040A29 #29041D #292304 #042911

square

#040A29 #29041D #292304 #042911

split-complementary

#040A29 #291104 #1D2904

monochromatic

#03071C #03071C #040A29 #091861 #0F2599

Accessibility & contrast

On white

19.43

#040A29 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040A29 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A29

19.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A29	#FFFFFF	#000000	##FFFFFF
##040A29	1.00	19.43	1.08	19.43
#FFFFFF	19.43	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F2A

Deuteranopia (green-blind)

#000B28

Tritanopia (blue-blind)

#001217

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040a29;
/* rgb */ color: rgb(4, 10, 41);
/* oklch */ color: oklch(16.3% 0.064 267.8);

Tailwind

colors: {
  custom: {
    50: '#494b63',
    500: '#040a29',
    950: '#000000',
  },
}

SCSS

$custom: #040a29;
$custom-light: #494b63;
$custom-dark: #000000;

JSON

{
  "hex": "#040a29",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 41
  },
  "hsl": {
    "h": 230.27,
    "s": 82.222,
    "l": 8.824
  },
  "oklch": {
    "l": 0.16321,
    "c": 0.06417,
    "h": 267.8
  },
  "luminance": 0.00403
}

Semantic roles & 50–950 ramp

primary

#040A29

secondary

#6C5F1D

accent

#D82FF9

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040A29

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

Preview Lab → · Contrast checker → · Palette generator →