#040E3F#040E3F

#040E3F is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.8% C 0.094 H 266.4°. Best body text is #FFFFFF at 18.42:1 contrast (WCAG AA passes).

Color values

HEX	#040E3F
RGB	rgb(4, 14, 63)
HSL	hsl(230, 88%, 13%)
HSV	hsv(230, 94%, 25%)
CMYK	cmyk(93.7%, 77.8%, 0%, 75.3%)
CIE-LAB	lab(6.31, 17.07, -32.08)
CIE-LCH	lch(6.31, 36.34, 298.02°)
OKLab	oklab(19.81% -0.006 -0.0937)
OKLCH	oklch(19.81% 0.094 266.4)
XYZ	xyz(1.1040, 0.6986, 4.7783)
Luminance	0.0070 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040E3F #3F3504

analogous

#042B3F #040E3F #17043F

triadic

#040E3F #3F040E #0E3F04

tetradic

#040E3F #3F042B #3F3504 #043F17

square

#040E3F #3F042B #3F3504 #043F17

split-complementary

#040E3F #3F1704 #2B3F04

monochromatic

#02061D #02061D #040E3F #081B79 #0B28B2

Accessibility & contrast

On white

18.42

#040E3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#040E3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040E3F

18.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040E3F	#FFFFFF	#000000	##FFFFFF
##040E3F	1.00	18.42	1.14	18.42
#FFFFFF	18.42	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001741

Deuteranopia (green-blind)

#00113E

Tritanopia (blue-blind)

#001C25

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #040e3f;
/* rgb */ color: rgb(4, 14, 63);
/* oklch */ color: oklch(19.8% 0.094 266.4);

Tailwind

colors: {
  custom: {
    50: '#514c75',
    500: '#040e3f',
    950: '#000000',
  },
}

SCSS

$custom: #040e3f;
$custom-light: #514c75;
$custom-dark: #000000;

JSON

{
  "hex": "#040e3f",
  "rgb": {
    "r": 4,
    "g": 14,
    "b": 63
  },
  "hsl": {
    "h": 229.831,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.19815,
    "c": 0.09385,
    "h": 266.4
  },
  "luminance": 0.00699
}

Semantic roles & 50–950 ramp

primary

#040E3F

secondary

#80701E

accent

#DA2AFE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020108

muted

#78777B

Preview Lab

Preview with #040E3F

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

Preview Lab → · Contrast checker → · Palette generator →