#040C3F#040C3F

#040C3F is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.4% C 0.096 H 267.0°. Best body text is #FFFFFF at 18.59:1 contrast (WCAG AA passes).

Color values

HEX	#040C3F
RGB	rgb(4, 12, 63)
HSL	hsl(232, 88%, 13%)
HSV	hsv(232, 94%, 25%)
CMYK	cmyk(93.7%, 81%, 0%, 75.3%)
CIE-LAB	lab(5.85, 18.18, -32.83)
CIE-LCH	lch(5.85, 37.53, 298.97°)
OKLab	oklab(19.41% -0.0051 -0.0963)
OKLCH	oklch(19.41% 0.096 267)
XYZ	xyz(1.0784, 0.6475, 4.7698)
Luminance	0.0065 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Navy Blue (survey)

#001146

ΔE00 1.72

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C3F #3F3704

analogous

#04293F #040C3F #19043F

triadic

#040C3F #3F040C #0C3F04

tetradic

#040C3F #3F0429 #3F3704 #043F19

square

#040C3F #3F0429 #3F3704 #043F19

split-complementary

#040C3F #3F1904 #293F04

monochromatic

#02051D #02051D #040C3F #081779 #0B22B2

Accessibility & contrast

On white

18.59

#040C3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#040C3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C3F

18.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C3F	#FFFFFF	#000000	##FFFFFF
##040C3F	1.00	18.59	1.13	18.59
#FFFFFF	18.59	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001641

Deuteranopia (green-blind)

#00103E

Tritanopia (blue-blind)

#001B24

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #040c3f;
/* rgb */ color: rgb(4, 12, 63);
/* oklch */ color: oklch(19.4% 0.096 267.0);

Tailwind

colors: {
  custom: {
    50: '#514b75',
    500: '#040c3f',
    950: '#000000',
  },
}

SCSS

$custom: #040c3f;
$custom-light: #514b75;
$custom-dark: #000000;

JSON

{
  "hex": "#040c3f",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 63
  },
  "hsl": {
    "h": 231.864,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.19413,
    "c": 0.09645,
    "h": 267
  },
  "luminance": 0.00648
}

Semantic roles & 50–950 ramp

primary

#040C3F

secondary

#80731E

accent

#E12AFE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#020108

muted

#78777B

Preview Lab

Preview with #040C3F

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

Preview Lab → · Contrast checker → · Palette generator →