#040C28#040C28

#040C28 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 16.7% C 0.059 H 265.8°. Best body text is #FFFFFF at 19.29:1 contrast (WCAG AA passes).

Color values

HEX	#040C28
RGB	rgb(4, 12, 40)
HSL	hsl(227, 82%, 9%)
HSV	hsv(227, 90%, 16%)
CMYK	cmyk(90%, 70%, 0%, 84.3%)
CIE-LAB	lab(3.99, 5.91, -18.85)
CIE-LCH	lch(3.99, 19.75, 287.42°)
OKLab	oklab(16.72% -0.0043 -0.0591)
OKLCH	oklch(16.72% 0.059 265.8)
XYZ	xyz(0.5644, 0.4419, 2.0626)
Luminance	0.0044 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.67

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C28 #282004

analogous

#041E28 #040C28 #0E0428

triadic

#040C28 #28040C #0C2804

tetradic

#040C28 #28041E #282004 #04280E

square

#040C28 #28041E #282004 #04280E

split-complementary

#040C28 #280E04 #1E2804

monochromatic

#03081C #03081C #040C28 #0A1D60 #0F2D97

Accessibility & contrast

On white

19.29

#040C28 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040C28 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C28

19.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C28	#FFFFFF	#000000	##FFFFFF
##040C28	1.00	19.29	1.09	19.29
#FFFFFF	19.29	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001029

Deuteranopia (green-blind)

#000C27

Tritanopia (blue-blind)

#001318

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040c28;
/* rgb */ color: rgb(4, 12, 40);
/* oklch */ color: oklch(16.7% 0.059 265.8);

Tailwind

colors: {
  custom: {
    50: '#494c62',
    500: '#040c28',
    950: '#000000',
  },
}

SCSS

$custom: #040c28;
$custom-light: #494c62;
$custom-dark: #000000;

JSON

{
  "hex": "#040c28",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 40
  },
  "hsl": {
    "h": 226.667,
    "s": 81.818,
    "l": 8.627
  },
  "oklch": {
    "l": 0.16721,
    "c": 0.05925,
    "h": 265.8
  },
  "luminance": 0.00442
}

Semantic roles & 50–950 ramp

primary

#040C28

secondary

#6B5A1D

accent

#CC30F8

background

#F4F4F5

surface

#E7E7EA

border

#C3C3C6

text

#010105

muted

#777779

Preview Lab

Preview with #040C28

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

Preview Lab → · Contrast checker → · Palette generator →