#040A2C#040A2C

#040A2C is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.7% C 0.069 H 268.0°. Best body text is #FFFFFF at 19.35:1 contrast (WCAG AA passes).

Color values

HEX	#040A2C
RGB	rgb(4, 10, 44)
HSL	hsl(231, 83%, 9%)
HSV	hsv(231, 91%, 17%)
CMYK	cmyk(90.9%, 77.3%, 0%, 82.7%)
CIE-LAB	lab(3.84, 8.58, -22.12)
CIE-LCH	lch(3.84, 23.73, 291.20°)
OKLab	oklab(16.66% -0.0025 -0.0692)
OKLCH	oklch(16.66% 0.069 268)
XYZ	xyz(0.6131, 0.4247, 2.4320)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.79

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A2C #2C2604

analogous

#041E2C #040A2C #12042C

triadic

#040A2C #2C040A #0A2C04

tetradic

#040A2C #2C041E #2C2604 #042C12

square

#040A2C #2C041E #2C2604 #042C12

split-complementary

#040A2C #2C1204 #1E2C04

monochromatic

#03061C #03061C #040A2C #091764 #0E249C

Accessibility & contrast

On white

19.35

#040A2C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040A2C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A2C

19.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A2C	#FFFFFF	#000000	##FFFFFF
##040A2C	1.00	19.35	1.09	19.35
#FFFFFF	19.35	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00102D

Deuteranopia (green-blind)

#000C2B

Tritanopia (blue-blind)

#001319

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040a2c;
/* rgb */ color: rgb(4, 10, 44);
/* oklch */ color: oklch(16.7% 0.069 268.0);

Tailwind

colors: {
  custom: {
    50: '#494b65',
    500: '#040a2c',
    950: '#000000',
  },
}

SCSS

$custom: #040a2c;
$custom-light: #494b65;
$custom-dark: #000000;

JSON

{
  "hex": "#040a2c",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 44
  },
  "hsl": {
    "h": 231,
    "s": 83.333,
    "l": 9.412
  },
  "oklch": {
    "l": 0.16664,
    "c": 0.06927,
    "h": 268
  },
  "luminance": 0.00425
}

Semantic roles & 50–950 ramp

primary

#040A2C

secondary

#6F621D

accent

#DB2EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010105

muted

#77777A

Preview Lab

Preview with #040A2C

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

Preview Lab → · Contrast checker → · Palette generator →