#040B00#040B00

#040B00 is a very dark, muted yellow-green. Relative luminance 0.003; OKLCH L 13.6% C 0.037 H 131.1°. Best body text is #FFFFFF at 19.94:1 contrast (WCAG AA passes).

Color values

HEX	#040B00
RGB	rgb(4, 11, 0)
HSL	hsl(98, 100%, 2%)
HSV	hsv(98, 100%, 4%)
CMYK	cmyk(63.6%, 0%, 100%, 95.7%)
CIE-LAB	lab(2.39, -3.37, 3.53)
CIE-LCH	lch(2.39, 4.88, 133.71°)
OKLab	oklab(13.56% -0.0244 0.028)
OKLCH	oklch(13.56% 0.037 131.1)
XYZ	xyz(0.1697, 0.2651, 0.0422)
Luminance	0.0027 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B00 #07000B

analogous

#0A0B00 #040B00 #000B02

triadic

#040B00 #00040B #0B0004

tetradic

#040B00 #000A0B #07000B #0B0200

square

#040B00 #000A0B #07000B #0B0200

split-complementary

#040B00 #02000B #0B000A

monochromatic

#0B1F00 #0B1F00 #0B1F00 #1A4800 #318500

Accessibility & contrast

On white

19.94

#040B00 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.05

#040B00 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B00

19.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B00	#FFFFFF	#000000	##FFFFFF
##040B00	1.00	19.94	1.05	19.94
#FFFFFF	19.94	1.00	21.00	1.00
#000000	1.05	21.00	1.00	21.00
##FFFFFF	19.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C0900

Deuteranopia (green-blind)

#0B0900

Tritanopia (blue-blind)

#040A08

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #040b00;
/* rgb */ color: rgb(4, 11, 0);
/* oklch */ color: oklch(13.6% 0.037 131.1);

Tailwind

colors: {
  custom: {
    50: '#484c47',
    500: '#040b00',
    950: '#000000',
  },
}

SCSS

$custom: #040b00;
$custom-light: #484c47;
$custom-dark: #000000;

JSON

{
  "hex": "#040b00",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 0
  },
  "hsl": {
    "h": 98.182,
    "s": 100,
    "l": 2.157
  },
  "oklch": {
    "l": 0.13556,
    "c": 0.03713,
    "h": 131.1
  },
  "luminance": 0.00265
}

Semantic roles & 50–950 ramp

primary

#040B00

secondary

#3D0F57

accent

#29FFB1

background

#F4F4F3

surface

#E6E7E5

border

#C2C3C1

text

#000100

muted

#777777

Preview Lab

Preview with #040B00

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

Preview Lab → · Contrast checker → · Palette generator →