#040F34#040F34

#040F34 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.8% C 0.075 H 265.2°. Best body text is #FFFFFF at 18.70:1 contrast (WCAG AA passes).

Color values

HEX	#040F34
RGB	rgb(4, 15, 52)
HSL	hsl(226, 86%, 11%)
HSV	hsv(226, 92%, 20%)
CMYK	cmyk(92.3%, 71.2%, 0%, 79.6%)
CIE-LAB	lab(5.56, 10.47, -25.33)
CIE-LCH	lch(5.56, 27.41, 292.46°)
OKLab	oklab(18.76% -0.0062 -0.0748)
OKLCH	oklch(18.76% 0.075 265.2)
XYZ	xyz(0.8405, 0.6153, 3.3226)
Luminance	0.0062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.78

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F34 #342904

analogous

#042734 #040F34 #110434

triadic

#040F34 #34040F #0F3404

tetradic

#040F34 #340427 #342904 #043411

square

#040F34 #340427 #342904 #043411

split-complementary

#040F34 #341104 #273404

monochromatic

#02081C #02081C #040F34 #081F6D #0D30A6

Accessibility & contrast

On white

18.70

#040F34 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040F34 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F34

18.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F34	#FFFFFF	#000000	##FFFFFF
##040F34	1.00	18.70	1.12	18.70
#FFFFFF	18.70	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001535

Deuteranopia (green-blind)

#001033

Tritanopia (blue-blind)

#00181F

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #040f34;
/* rgb */ color: rgb(4, 15, 52);
/* oklch */ color: oklch(18.8% 0.075 265.2);

Tailwind

colors: {
  custom: {
    50: '#4c4d6c',
    500: '#040f34',
    950: '#000000',
  },
}

SCSS

$custom: #040f34;
$custom-light: #4c4d6c;
$custom-dark: #000000;

JSON

{
  "hex": "#040f34",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 52
  },
  "hsl": {
    "h": 226.25,
    "s": 85.714,
    "l": 10.98
  },
  "oklch": {
    "l": 0.18764,
    "c": 0.07502,
    "h": 265.2
  },
  "luminance": 0.00615
}

Semantic roles & 50–950 ramp

primary

#040F34

secondary

#76621E

accent

#CC2CFC

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010107

muted

#77777A

Preview Lab

Preview with #040F34

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

Preview Lab → · Contrast checker → · Palette generator →