#040F38#040F38

#040F38 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.2% C 0.082 H 265.6°. Best body text is #FFFFFF at 18.57:1 contrast (WCAG AA passes).

Color values

HEX	#040F38
RGB	rgb(4, 15, 56)
HSL	hsl(227, 87%, 12%)
HSV	hsv(227, 93%, 22%)
CMYK	cmyk(92.9%, 73.2%, 0%, 78%)
CIE-LAB	lab(5.90, 12.73, -27.70)
CIE-LCH	lch(5.90, 30.49, 294.68°)
OKLab	oklab(19.21% -0.0062 -0.0813)
OKLCH	oklch(19.21% 0.082 265.6)
XYZ	xyz(0.9345, 0.6529, 3.8174)
Luminance	0.0065 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 2.90

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F38 #382D04

analogous

#042938 #040F38 #130438

triadic

#040F38 #38040F #0F3804

tetradic

#040F38 #380429 #382D04 #043813

square

#040F38 #380429 #382D04 #043813

split-complementary

#040F38 #381304 #293804

monochromatic

#02081D #02081D #040F38 #081E71 #0C2EAA

Accessibility & contrast

On white

18.57

#040F38 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#040F38 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F38

18.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F38	#FFFFFF	#000000	##FFFFFF
##040F38	1.00	18.57	1.13	18.57
#FFFFFF	18.57	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001639

Deuteranopia (green-blind)

#001137

Tritanopia (blue-blind)

#001A21

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #040f38;
/* rgb */ color: rgb(4, 15, 56);
/* oklch */ color: oklch(19.2% 0.082 265.6);

Tailwind

colors: {
  custom: {
    50: '#4e4d6f',
    500: '#040f38',
    950: '#000000',
  },
}

SCSS

$custom: #040f38;
$custom-light: #4e4d6f;
$custom-dark: #000000;

JSON

{
  "hex": "#040f38",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 56
  },
  "hsl": {
    "h": 227.308,
    "s": 86.667,
    "l": 11.765
  },
  "oklch": {
    "l": 0.1921,
    "c": 0.08152,
    "h": 265.6
  },
  "luminance": 0.00653
}

Semantic roles & 50–950 ramp

primary

#040F38

secondary

#7A661E

accent

#D02BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040F38

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

Preview Lab → · Contrast checker → · Palette generator →