#040B29#040B29

#040B29 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.6% C 0.063 H 267.0°. Best body text is #FFFFFF at 19.35:1 contrast (WCAG AA passes).

Color values

HEX	#040B29
RGB	rgb(4, 11, 41)
HSL	hsl(229, 82%, 9%)
HSV	hsv(229, 90%, 16%)
CMYK	cmyk(90.2%, 73.2%, 0%, 83.9%)
CIE-LAB	lab(3.84, 6.79, -19.84)
CIE-LCH	lch(3.84, 20.97, 288.88°)
OKLab	oklab(16.57% -0.0033 -0.0625)
OKLCH	oklch(16.57% 0.063 267)
XYZ	xyz(0.5698, 0.4252, 2.1494)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.06

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B29 #292204

analogous

#041E29 #040B29 #100429

triadic

#040B29 #29040B #0B2904

tetradic

#040B29 #29041E #292204 #042910

square

#040B29 #29041E #292204 #042910

split-complementary

#040B29 #291004 #1E2904

monochromatic

#03071C #03071C #040B29 #091A61 #0F2999

Accessibility & contrast

On white

19.35

#040B29 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040B29 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B29

19.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B29	#FFFFFF	#000000	##FFFFFF
##040B29	1.00	19.35	1.09	19.35
#FFFFFF	19.35	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F2A

Deuteranopia (green-blind)

#000C28

Tritanopia (blue-blind)

#001318

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040b29;
/* rgb */ color: rgb(4, 11, 41);
/* oklch */ color: oklch(16.6% 0.063 267.0);

Tailwind

colors: {
  custom: {
    50: '#494b63',
    500: '#040b29',
    950: '#000000',
  },
}

SCSS

$custom: #040b29;
$custom-light: #494b63;
$custom-dark: #000000;

JSON

{
  "hex": "#040b29",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 41
  },
  "hsl": {
    "h": 228.649,
    "s": 82.222,
    "l": 8.824
  },
  "oklch": {
    "l": 0.1657,
    "c": 0.0626,
    "h": 267
  },
  "luminance": 0.00425
}

Semantic roles & 50–950 ramp

primary

#040B29

secondary

#6C5D1D

accent

#D22FF9

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040B29

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

Preview Lab → · Contrast checker → · Palette generator →