#040A33#040A33

#040A33 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.5% C 0.081 H 267.9°. Best body text is #FFFFFF at 19.15:1 contrast (WCAG AA passes).

Color values

HEX	#040A33
RGB	rgb(4, 10, 51)
HSL	hsl(232, 85%, 11%)
HSV	hsv(232, 92%, 20%)
CMYK	cmyk(92.2%, 80.4%, 0%, 80%)
CIE-LAB	lab(4.35, 12.21, -26.53)
CIE-LCH	lch(4.35, 29.20, 294.71°)
OKLab	oklab(17.5% -0.0029 -0.0806)
OKLCH	oklch(17.5% 0.081 267.9)
XYZ	xyz(0.7559, 0.4818, 3.1845)
Luminance	0.0048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A33 #332D04

analogous

#042133 #040A33 #150433

triadic

#040A33 #33040A #0A3304

tetradic

#040A33 #330421 #332D04 #043315

square

#040A33 #330421 #332D04 #043315

split-complementary

#040A33 #331504 #213304

monochromatic

#02061C #02061C #040A33 #08156C #0D20A4

Accessibility & contrast

On white

19.15

#040A33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040A33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A33

19.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A33	#FFFFFF	#000000	##FFFFFF
##040A33	1.00	19.15	1.10	19.15
#FFFFFF	19.15	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001134

Deuteranopia (green-blind)

#000D32

Tritanopia (blue-blind)

#00151D

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040a33;
/* rgb */ color: rgb(4, 10, 51);
/* oklch */ color: oklch(17.5% 0.081 267.9);

Tailwind

colors: {
  custom: {
    50: '#4c4b6b',
    500: '#040a33',
    950: '#000000',
  },
}

SCSS

$custom: #040a33;
$custom-light: #4c4b6b;
$custom-dark: #000000;

JSON

{
  "hex": "#040a33",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 51
  },
  "hsl": {
    "h": 232.34,
    "s": 85.455,
    "l": 10.784
  },
  "oklch": {
    "l": 0.17503,
    "c": 0.08069,
    "h": 267.9
  },
  "luminance": 0.00482
}

Semantic roles & 50–950 ramp

primary

#040A33

secondary

#756A1D

accent

#E12CFC

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040A33

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

Preview Lab → · Contrast checker → · Palette generator →