#040509#040509

#040509 is a very dark, near-neutral blue. Relative luminance 0.002; OKLCH L 11.6% C 0.012 H 270.7°. Best body text is #FFFFFF at 20.37:1 contrast (WCAG AA passes).

Color values

HEX	#040509
RGB	rgb(4, 5, 9)
HSL	hsl(228, 38%, 3%)
HSV	hsv(228, 56%, 4%)
CMYK	cmyk(55.6%, 44.4%, 0%, 96.5%)
CIE-LAB	lab(1.39, 0.29, -1.60)
CIE-LCH	lch(1.39, 1.63, 280.32°)
OKLab	oklab(11.58% 0.0001 -0.0119)
OKLCH	oklch(11.58% 0.012 270.7)
XYZ	xyz(0.1536, 0.1541, 0.2800)
Luminance	0.0015 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040509 #090804

analogous

#040709 #040509 #050409

triadic

#040509 #090405 #050904

tetradic

#040509 #090407 #090804 #040905

square

#040509 #090407 #090804 #040905

split-complementary

#040509 #090504 #070904

monochromatic

#090C15 #090C15 #090C15 #171D33 #2A345E

Accessibility & contrast

On white

20.37

#040509 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.03

#040509 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040509

20.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040509	#FFFFFF	#000000	##FFFFFF
##040509	1.00	20.37	1.03	20.37
#FFFFFF	20.37	1.00	21.00	1.00
#000000	1.03	21.00	1.00	21.00
##FFFFFF	20.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#040509

Deuteranopia (green-blind)

#040509

Tritanopia (blue-blind)

#030606

Achromatopsia (no color)

#050505

Design tokens & code

CSS

--color: #040509;
/* rgb */ color: rgb(4, 5, 9);
/* oklch */ color: oklch(11.6% 0.012 270.7);

Tailwind

colors: {
  custom: {
    50: '#48494b',
    500: '#040509',
    950: '#000000',
  },
}

SCSS

$custom: #040509;
$custom-light: #48494b;
$custom-dark: #000000;

JSON

{
  "hex": "#040509",
  "rgb": {
    "r": 4,
    "g": 5,
    "b": 9
  },
  "hsl": {
    "h": 228,
    "s": 38.462,
    "l": 2.549
  },
  "oklch": {
    "l": 0.11582,
    "c": 0.01188,
    "h": 270.7
  },
  "luminance": 0.00154
}

Semantic roles & 50–950 ramp

primary

#040509

secondary

#433D26

accent

#B759CE

background

#F4F4F4

surface

#E6E6E7

border

#C2C2C3

text

#000001

muted

#777777

Preview Lab

Preview with #040509

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

Preview Lab → · Contrast checker → · Palette generator →