#040B33#040B33

#040B33 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.7% C 0.079 H 267.5°. Best body text is #FFFFFF at 19.08:1 contrast (WCAG AA passes).

Color values

HEX	#040B33
RGB	rgb(4, 11, 51)
HSL	hsl(231, 85%, 11%)
HSV	hsv(231, 92%, 20%)
CMYK	cmyk(92.2%, 78.4%, 0%, 80%)
CIE-LAB	lab(4.55, 11.80, -26.21)
CIE-LCH	lch(4.55, 28.74, 294.23°)
OKLab	oklab(17.72% -0.0035 -0.0792)
OKLCH	oklch(17.72% 0.079 267.5)
XYZ	xyz(0.7671, 0.5041, 3.1882)
Luminance	0.0050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 2.91

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B33 #332C04

analogous

#042233 #040B33 #140433

triadic

#040B33 #33040B #0B3304

tetradic

#040B33 #330422 #332C04 #043314

square

#040B33 #330422 #332C04 #043314

split-complementary

#040B33 #331404 #223304

monochromatic

#02061C #02061C #040B33 #08176C #0D23A4

Accessibility & contrast

On white

19.08

#040B33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040B33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B33

19.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B33	#FFFFFF	#000000	##FFFFFF
##040B33	1.00	19.08	1.10	19.08
#FFFFFF	19.08	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001234

Deuteranopia (green-blind)

#000D32

Tritanopia (blue-blind)

#00161D

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040b33;
/* rgb */ color: rgb(4, 11, 51);
/* oklch */ color: oklch(17.7% 0.079 267.5);

Tailwind

colors: {
  custom: {
    50: '#4c4b6b',
    500: '#040b33',
    950: '#000000',
  },
}

SCSS

$custom: #040b33;
$custom-light: #4c4b6b;
$custom-dark: #000000;

JSON

{
  "hex": "#040b33",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 51
  },
  "hsl": {
    "h": 231.064,
    "s": 85.455,
    "l": 10.784
  },
  "oklch": {
    "l": 0.1772,
    "c": 0.07929,
    "h": 267.5
  },
  "luminance": 0.00504
}

Semantic roles & 50–950 ramp

primary

#040B33

secondary

#75681D

accent

#DD2CFC

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040B33

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

Preview Lab → · Contrast checker → · Palette generator →