#040F27#040F27

#040F27 is a very dark, muted blue. Relative luminance 0.005; OKLCH L 17.4% C 0.053 H 261.7°. Best body text is #FFFFFF at 19.04:1 contrast (WCAG AA passes).

Color values

HEX	#040F27
RGB	rgb(4, 15, 39)
HSL	hsl(221, 81%, 8%)
HSV	hsv(221, 90%, 15%)
CMYK	cmyk(89.7%, 61.5%, 0%, 84.7%)
CIE-LAB	lab(4.64, 4.04, -17.07)
CIE-LCH	lch(4.64, 17.54, 283.31°)
OKLab	oklab(17.44% -0.0076 -0.0521)
OKLCH	oklch(17.44% 0.053 261.7)
XYZ	xyz(0.5870, 0.5139, 1.9873)
Luminance	0.0051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.92

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F27 #271C04

analogous

#042027 #040F27 #0A0427

triadic

#040F27 #27040F #0F2704

tetradic

#040F27 #270420 #271C04 #04270A

square

#040F27 #270420 #271C04 #04270A

split-complementary

#040F27 #270A04 #202704

monochromatic

#030B1C #030B1C #040F27 #0A245F #0F3A96

Accessibility & contrast

On white

19.04

#040F27 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040F27 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F27

19.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F27	#FFFFFF	#000000	##FFFFFF
##040F27	1.00	19.04	1.10	19.04
#FFFFFF	19.04	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031228

Deuteranopia (green-blind)

#000E27

Tritanopia (blue-blind)

#001519

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040f27;
/* rgb */ color: rgb(4, 15, 39);
/* oklch */ color: oklch(17.4% 0.053 261.7);

Tailwind

colors: {
  custom: {
    50: '#494e61',
    500: '#040f27',
    950: '#000000',
  },
}

SCSS

$custom: #040f27;
$custom-light: #494e61;
$custom-dark: #000000;

JSON

{
  "hex": "#040f27",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 39
  },
  "hsl": {
    "h": 221.143,
    "s": 81.395,
    "l": 8.431
  },
  "oklch": {
    "l": 0.17438,
    "c": 0.05266,
    "h": 261.7
  },
  "luminance": 0.00514
}

Semantic roles & 50–950 ramp

primary

#040F27

secondary

#6A521D

accent

#B930F8

background

#F4F4F5

surface

#E7E7E9

border

#C3C3C5

text

#010105

muted

#777779

Preview Lab

Preview with #040F27

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

Preview Lab → · Contrast checker → · Palette generator →