#040027#040027

#040027 is a very dark, moderate blue. Relative luminance 0.002; OKLCH L 13.0% C 0.082 H 275.3°. Best body text is #FFFFFF at 20.30:1 contrast (WCAG AA passes).

Color values

HEX	#040027
RGB	rgb(4, 0, 39)
HSL	hsl(246, 100%, 8%)
HSV	hsv(246, 100%, 15%)
CMYK	cmyk(89.7%, 100%, 0%, 84.7%)
CIE-LAB	lab(1.56, 10.34, -21.88)
CIE-LCH	lch(1.56, 24.20, 295.29°)
OKLab	oklab(13.02% 0.0075 -0.0813)
OKLCH	oklch(13.02% 0.082 275.3)
XYZ	xyz(0.4162, 0.1723, 1.9304)
Luminance	0.0017 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040027 #232700

analogous

#000F27 #040027 #170027

triadic

#040027 #270400 #002704

tetradic

#040027 #27000F #232700 #002717

square

#040027 #27000F #232700 #002717

split-complementary

#040027 #271700 #0F2700

monochromatic

#03001F #03001F #040027 #0A0064 #1100A1

Accessibility & contrast

On white

20.30

#040027 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.03

#040027 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040027

20.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040027	#FFFFFF	#000000	##FFFFFF
##040027	1.00	20.30	1.03	20.30
#FFFFFF	20.30	1.00	21.00	1.00
#000000	1.03	21.00	1.00	21.00
##FFFFFF	20.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000728

Deuteranopia (green-blind)

#000426

Tritanopia (blue-blind)

#000A12

Achromatopsia (no color)

#060606

Design tokens & code

CSS

--color: #040027;
/* rgb */ color: rgb(4, 0, 39);
/* oklch */ color: oklch(13.0% 0.082 275.3);

Tailwind

colors: {
  custom: {
    50: '#484661',
    500: '#040027',
    950: '#000000',
  },
}

SCSS

$custom: #040027;
$custom-light: #484661;
$custom-dark: #000000;

JSON

{
  "hex": "#040027",
  "rgb": {
    "r": 4,
    "g": 0,
    "b": 39
  },
  "hsl": {
    "h": 246.154,
    "s": 100,
    "l": 7.647
  },
  "oklch": {
    "l": 0.13016,
    "c": 0.08162,
    "h": 275.3
  },
  "luminance": 0.00172
}

Semantic roles & 50–950 ramp

primary

#040027

secondary

#666F14

accent

#FF29E9

background

#F4F3F5

surface

#E7E5EA

border

#C3C1C6

text

#010005

muted

#777779

Preview Lab

Preview with #040027

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

Preview Lab → · Contrast checker → · Palette generator →