#040A20#040A20

#040A20 is a very dark, muted blue. Relative luminance 0.003; OKLCH L 15.4% C 0.048 H 266.4°. Best body text is #FFFFFF at 19.64:1 contrast (WCAG AA passes).

Color values

HEX	#040A20
RGB	rgb(4, 10, 32)
HSL	hsl(227, 78%, 7%)
HSV	hsv(227, 88%, 13%)
CMYK	cmyk(87.5%, 68.8%, 0%, 87.5%)
CIE-LAB	lab(3.14, 3.66, -13.99)
CIE-LCH	lch(3.14, 14.46, 284.66°)
OKLab	oklab(15.37% -0.003 -0.0479)
OKLCH	oklch(15.37% 0.048 266.4)
XYZ	xyz(0.4192, 0.3471, 1.4111)
Luminance	0.0035 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A20 #201A04

analogous

#041820 #040A20 #0C0420

triadic

#040A20 #20040A #0A2004

tetradic

#040A20 #200418 #201A04 #04200C

square

#040A20 #200418 #201A04 #04200C

split-complementary

#040A20 #200C04 #182004

monochromatic

#03081B #03081B #040A20 #0B1B56 #122C8D

Accessibility & contrast

On white

19.64

#040A20 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#040A20 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A20

19.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A20	#FFFFFF	#000000	##FFFFFF
##040A20	1.00	19.64	1.07	19.64
#FFFFFF	19.64	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#010D21

Deuteranopia (green-blind)

#000A20

Tritanopia (blue-blind)

#000F13

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #040a20;
/* rgb */ color: rgb(4, 10, 32);
/* oklch */ color: oklch(15.4% 0.048 266.4);

Tailwind

colors: {
  custom: {
    50: '#484b5b',
    500: '#040a20',
    950: '#000000',
  },
}

SCSS

$custom: #040a20;
$custom-light: #484b5b;
$custom-dark: #000000;

JSON

{
  "hex": "#040a20",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 32
  },
  "hsl": {
    "h": 227.143,
    "s": 77.778,
    "l": 7.059
  },
  "oklch": {
    "l": 0.15368,
    "c": 0.04805,
    "h": 266.4
  },
  "luminance": 0.00347
}

Semantic roles & 50–950 ramp

primary

#040A20

secondary

#63541D

accent

#CB34F4

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000104

muted

#777779

Preview Lab

Preview with #040A20

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

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