#040440#040440

#040440 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.0% C 0.108 H 268.5°. Best body text is #FFFFFF at 19.15:1 contrast (WCAG AA passes).

Color values

HEX	#040440
RGB	rgb(4, 4, 64)
HSL	hsl(240, 88%, 13%)
HSV	hsv(240, 94%, 25%)
CMYK	cmyk(93.8%, 93.8%, 0%, 74.9%)
CIE-LAB	lab(4.36, 22.48, -35.98)
CIE-LCH	lch(4.36, 42.43, 301.99°)
OKLab	oklab(18.03% -0.0028 -0.1079)
OKLCH	oklch(18.03% 0.108 268.5)
XYZ	xyz(1.0186, 0.4827, 4.8890)
Luminance	0.0048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 2.15

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040440 #404004

analogous

#042240 #040440 #220440

triadic

#040440 #400404 #044004

tetradic

#040440 #400422 #404004 #044022

square

#040440 #400422 #404004 #044022

split-complementary

#040440 #402204 #224004

monochromatic

#02021D #02021D #040440 #08087A #0B0BB3

Accessibility & contrast

On white

19.15

#040440 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040440 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040440

19.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040440	#FFFFFF	#000000	##FFFFFF
##040440	1.00	19.15	1.10	19.15
#FFFFFF	19.15	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001242

Deuteranopia (green-blind)

#000C3F

Tritanopia (blue-blind)

#001723

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040440;
/* rgb */ color: rgb(4, 4, 64);
/* oklch */ color: oklch(18.0% 0.108 268.5);

Tailwind

colors: {
  custom: {
    50: '#514776',
    500: '#040440',
    950: '#000000',
  },
}

SCSS

$custom: #040440;
$custom-light: #514776;
$custom-dark: #000000;

JSON

{
  "hex": "#040440",
  "rgb": {
    "r": 4,
    "g": 4,
    "b": 64
  },
  "hsl": {
    "h": 240,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.1803,
    "c": 0.10797,
    "h": 268.5
  },
  "luminance": 0.00483
}

Semantic roles & 50–950 ramp

primary

#040440

secondary

#81811F

accent

#FE29FE

background

#F4F4F7

surface

#E8E6ED

border

#C4C2C8

text

#030008

muted

#78777B

Preview Lab

Preview with #040440

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

Preview Lab → · Contrast checker → · Palette generator →