#040C33#040C33

#040C33 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.9% C 0.078 H 267.0°. Best body text is #FFFFFF at 18.99:1 contrast (WCAG AA passes).

Color values

HEX	#040C33
RGB	rgb(4, 12, 51)
HSL	hsl(230, 85%, 11%)
HSV	hsv(230, 92%, 20%)
CMYK	cmyk(92.2%, 76.5%, 0%, 80%)
CIE-LAB	lab(4.77, 11.36, -25.86)
CIE-LCH	lch(4.77, 28.25, 293.71°)
OKLab	oklab(17.94% -0.0041 -0.0777)
OKLCH	oklch(17.94% 0.078 267)
XYZ	xyz(0.7789, 0.5277, 3.1921)
Luminance	0.0053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.17

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C33 #332B04

analogous

#042333 #040C33 #130433

triadic

#040C33 #33040C #0C3304

tetradic

#040C33 #330423 #332B04 #043313

square

#040C33 #330423 #332B04 #043313

split-complementary

#040C33 #331304 #233304

monochromatic

#02071C #02071C #040C33 #08196C #0D27A4

Accessibility & contrast

On white

18.99

#040C33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040C33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C33

18.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C33	#FFFFFF	#000000	##FFFFFF
##040C33	1.00	18.99	1.11	18.99
#FFFFFF	18.99	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001334

Deuteranopia (green-blind)

#000E32

Tritanopia (blue-blind)

#00161D

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040c33;
/* rgb */ color: rgb(4, 12, 51);
/* oklch */ color: oklch(17.9% 0.078 267.0);

Tailwind

colors: {
  custom: {
    50: '#4c4c6b',
    500: '#040c33',
    950: '#000000',
  },
}

SCSS

$custom: #040c33;
$custom-light: #4c4c6b;
$custom-dark: #000000;

JSON

{
  "hex": "#040c33",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 51
  },
  "hsl": {
    "h": 229.787,
    "s": 85.455,
    "l": 10.784
  },
  "oklch": {
    "l": 0.17944,
    "c": 0.07784,
    "h": 267
  },
  "luminance": 0.00528
}

Semantic roles & 50–950 ramp

primary

#040C33

secondary

#75661D

accent

#D82CFC

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040C33

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

Preview Lab → · Contrast checker → · Palette generator →