#040340#040340

#040340 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.8% C 0.109 H 268.6°. Best body text is #FFFFFF at 19.23:1 contrast (WCAG AA passes).

Color values

HEX	#040340
RGB	rgb(4, 3, 64)
HSL	hsl(241, 91%, 13%)
HSV	hsv(241, 95%, 25%)
CMYK	cmyk(93.8%, 95.3%, 0%, 74.9%)
CIE-LAB	lab(4.16, 22.93, -36.30)
CIE-LCH	lch(4.16, 42.94, 302.27°)
OKLab	oklab(17.83% -0.0026 -0.1093)
OKLCH	oklch(17.83% 0.109 268.6)
XYZ	xyz(1.0077, 0.4610, 4.8854)
Luminance	0.0046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 2.00

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040340 #3F4003

analogous

#032040 #040340 #220340

triadic

#040340 #400403 #034004

tetradic

#040340 #400320 #3F4003 #034022

square

#040340 #400320 #3F4003 #034022

split-complementary

#040340 #402203 #204003

monochromatic

#02011D #02011D #040340 #08067A #0B08B5

Accessibility & contrast

On white

19.23

#040340 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040340 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040340

19.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040340	#FFFFFF	#000000	##FFFFFF
##040340	1.00	19.23	1.09	19.23
#FFFFFF	19.23	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001242

Deuteranopia (green-blind)

#000B3F

Tritanopia (blue-blind)

#001722

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040340;
/* rgb */ color: rgb(4, 3, 64);
/* oklch */ color: oklch(17.8% 0.109 268.6);

Tailwind

colors: {
  custom: {
    50: '#514676',
    500: '#040340',
    950: '#000000',
  },
}

SCSS

$custom: #040340;
$custom-light: #514676;
$custom-dark: #000000;

JSON

{
  "hex": "#040340",
  "rgb": {
    "r": 4,
    "g": 3,
    "b": 64
  },
  "hsl": {
    "h": 240.984,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.17825,
    "c": 0.10934,
    "h": 268.6
  },
  "luminance": 0.00461
}

Semantic roles & 50–950 ramp

primary

#040340

secondary

#80821D

accent

#FF29FB

background

#F4F3F7

surface

#E8E5ED

border

#C4C1C8

text

#030008

muted

#78777B

Preview Lab

Preview with #040340

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

Preview Lab → · Contrast checker → · Palette generator →