#040A40#040A40

#040A40 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.2% C 0.100 H 267.5°. Best body text is #FFFFFF at 18.71:1 contrast (WCAG AA passes).

Color values

HEX	#040A40
RGB	rgb(4, 10, 64)
HSL	hsl(234, 88%, 13%)
HSV	hsv(234, 94%, 25%)
CMYK	cmyk(93.8%, 84.4%, 0%, 74.9%)
CIE-LAB	lab(5.54, 19.71, -34.06)
CIE-LCH	lch(5.54, 39.35, 300.06°)
OKLab	oklab(19.17% -0.0045 -0.1003)
OKLCH	oklch(19.17% 0.1 267.5)
XYZ	xyz(1.0837, 0.6129, 4.9107)
Luminance	0.0061 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Navy Blue (survey)

#001146

ΔE00 1.99

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A40 #403A04

analogous

#042840 #040A40 #1C0440

triadic

#040A40 #40040A #0A4004

tetradic

#040A40 #400428 #403A04 #04401C

square

#040A40 #400428 #403A04 #04401C

split-complementary

#040A40 #401C04 #284004

monochromatic

#02051D #02051D #040A40 #08137A #0B1CB3

Accessibility & contrast

On white

18.71

#040A40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040A40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A40

18.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A40	#FFFFFF	#000000	##FFFFFF
##040A40	1.00	18.71	1.12	18.71
#FFFFFF	18.71	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001542

Deuteranopia (green-blind)

#000F3F

Tritanopia (blue-blind)

#001A24

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040a40;
/* rgb */ color: rgb(4, 10, 64);
/* oklch */ color: oklch(19.2% 0.100 267.5);

Tailwind

colors: {
  custom: {
    50: '#514a75',
    500: '#040a40',
    950: '#000000',
  },
}

SCSS

$custom: #040a40;
$custom-light: #514a75;
$custom-dark: #000000;

JSON

{
  "hex": "#040a40",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 64
  },
  "hsl": {
    "h": 234,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.1917,
    "c": 0.10037,
    "h": 267.5
  },
  "luminance": 0.00613
}

Semantic roles & 50–950 ramp

primary

#040A40

secondary

#81771F

accent

#E929FE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030108

muted

#78777B

Preview Lab

Preview with #040A40

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

Preview Lab → · Contrast checker → · Palette generator →