#040B2D#040B2D

#040B2D is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.0% C 0.069 H 267.3°. Best body text is #FFFFFF at 19.25:1 contrast (WCAG AA passes).

Color values

HEX	#040B2D
RGB	rgb(4, 11, 45)
HSL	hsl(230, 84%, 10%)
HSV	hsv(230, 91%, 18%)
CMYK	cmyk(91.1%, 75.6%, 0%, 82.4%)
CIE-LAB	lab(4.11, 8.65, -22.45)
CIE-LCH	lch(4.11, 24.06, 291.08°)
OKLab	oklab(17.02% -0.0033 -0.0694)
OKLCH	oklch(17.02% 0.069 267.3)
XYZ	xyz(0.6432, 0.4545, 2.5359)
Luminance	0.0046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.70

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B2D #2D2604

analogous

#04202D #040B2D #12042D

triadic

#040B2D #2D040B #0B2D04

tetradic

#040B2D #2D0420 #2D2604 #042D12

square

#040B2D #2D0420 #2D2604 #042D12

split-complementary

#040B2D #2D1204 #202D04

monochromatic

#02071C #02071C #040B2D #091965 #0E269D

Accessibility & contrast

On white

19.25

#040B2D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040B2D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B2D

19.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B2D	#FFFFFF	#000000	##FFFFFF
##040B2D	1.00	19.25	1.09	19.25
#FFFFFF	19.25	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00102E

Deuteranopia (green-blind)

#000C2C

Tritanopia (blue-blind)

#00141A

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040b2d;
/* rgb */ color: rgb(4, 11, 45);
/* oklch */ color: oklch(17.0% 0.069 267.3);

Tailwind

colors: {
  custom: {
    50: '#4a4b66',
    500: '#040b2d',
    950: '#000000',
  },
}

SCSS

$custom: #040b2d;
$custom-light: #4a4b66;
$custom-dark: #000000;

JSON

{
  "hex": "#040b2d",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 45
  },
  "hsl": {
    "h": 229.756,
    "s": 83.673,
    "l": 9.608
  },
  "oklch": {
    "l": 0.17016,
    "c": 0.06944,
    "h": 267.3
  },
  "luminance": 0.00455
}

Semantic roles & 50–950 ramp

primary

#040B2D

secondary

#70621D

accent

#D72EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040B2D

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

Preview Lab → · Contrast checker → · Palette generator →