Night Blue#040348

#040348 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.1% C 0.120 H 267.8°. Best body text is #FFFFFF at 18.89:1 contrast (WCAG AA passes).

Night Blue — editorial page

Color values

HEX	#040348
RGB	rgb(4, 3, 72)
HSL	hsl(241, 92%, 15%)
HSV	hsv(241, 96%, 28%)
CMYK	cmyk(94.4%, 95.8%, 0%, 71.8%)
CIE-LAB	lab(5.05, 27.36, -40.54)
CIE-LCH	lch(5.05, 48.91, 304.02°)
OKLab	oklab(19.05% -0.0046 -0.1196)
OKLCH	oklch(19.05% 0.12 267.8)
XYZ	xyz(1.2519, 0.5587, 6.1715)
Luminance	0.0056 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.94

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040348 #474803

analogous

#032448 #040348 #270348

triadic

#040348 #480403 #034804

tetradic

#040348 #480324 #474803 #034827

square

#040348 #480324 #474803 #034827

split-complementary

#040348 #482703 #244803

monochromatic

#02011D #02011D #040348 #070583 #0B08BE

Accessibility & contrast

On white

18.89

#040348 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040348 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040348

18.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040348	#FFFFFF	#000000	##FFFFFF
##040348	1.00	18.89	1.11	18.89
#FFFFFF	18.89	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00154A

Deuteranopia (green-blind)

#000D47

Tritanopia (blue-blind)

#001A27

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #040348;
/* rgb */ color: rgb(4, 3, 72);
/* oklch */ color: oklch(19.1% 0.120 267.8);

Tailwind

colors: {
  custom: {
    50: '#55467c',
    500: '#040348',
    950: '#000000',
  },
}

SCSS

$custom: #040348;
$custom-light: #55467c;
$custom-dark: #000000;

JSON

{
  "hex": "#040348",
  "rgb": {
    "r": 4,
    "g": 3,
    "b": 72
  },
  "hsl": {
    "h": 240.87,
    "s": 92,
    "l": 14.706
  },
  "oklch": {
    "l": 0.19051,
    "c": 0.11966,
    "h": 267.8
  },
  "luminance": 0.00559
}

Semantic roles & 50–950 ramp

primary

#040348

secondary

#88891E

accent

#FF29FC

background

#F5F3F7

surface

#E9E5EE

border

#C5C1C9

text

#030009

muted

#78777B

Preview Lab

Preview with #040348

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

Preview Lab → · Contrast checker → · Palette generator →