#040B2E#040B2E

#040B2E is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.1% C 0.071 H 267.4°. Best body text is #FFFFFF at 19.22:1 contrast (WCAG AA passes).

Color values

HEX	#040B2E
RGB	rgb(4, 11, 46)
HSL	hsl(230, 84%, 10%)
HSV	hsv(230, 91%, 18%)
CMYK	cmyk(91.3%, 76.1%, 0%, 82%)
CIE-LAB	lab(4.18, 9.15, -23.09)
CIE-LCH	lch(4.18, 24.84, 291.61°)
OKLab	oklab(17.13% -0.0033 -0.071)
OKLCH	oklch(17.13% 0.071 267.4)
XYZ	xyz(0.6627, 0.4623, 2.6386)
Luminance	0.0046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.38

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B2E #2E2704

analogous

#04202E #040B2E #12042E

triadic

#040B2E #2E040B #0B2E04

tetradic

#040B2E #2E0420 #2E2704 #042E12

square

#040B2E #2E0420 #2E2704 #042E12

split-complementary

#040B2E #2E1204 #202E04

monochromatic

#02071C #02071C #040B2E #091866 #0E269F

Accessibility & contrast

On white

19.22

#040B2E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040B2E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B2E

19.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B2E	#FFFFFF	#000000	##FFFFFF
##040B2E	1.00	19.22	1.09	19.22
#FFFFFF	19.22	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112F

Deuteranopia (green-blind)

#000D2D

Tritanopia (blue-blind)

#00141A

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040b2e;
/* rgb */ color: rgb(4, 11, 46);
/* oklch */ color: oklch(17.1% 0.071 267.4);

Tailwind

colors: {
  custom: {
    50: '#4a4b67',
    500: '#040b2e',
    950: '#000000',
  },
}

SCSS

$custom: #040b2e;
$custom-light: #4a4b67;
$custom-dark: #000000;

JSON

{
  "hex": "#040b2e",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 46
  },
  "hsl": {
    "h": 230,
    "s": 84,
    "l": 9.804
  },
  "oklch": {
    "l": 0.17131,
    "c": 0.07111,
    "h": 267.4
  },
  "luminance": 0.00462
}

Semantic roles & 50–950 ramp

primary

#040B2E

secondary

#71631D

accent

#D82EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040B2E

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

Preview Lab → · Contrast checker → · Palette generator →