#40040B#40040B

#40040B is a very dark, moderate red. Relative luminance 0.012; OKLCH L 24.0% C 0.089 H 21.1°. Best body text is #FFFFFF at 16.93:1 contrast (WCAG AA passes).

Color values

HEX	#40040B
RGB	rgb(64, 4, 11)
HSL	hsl(353, 88%, 13%)
HSV	hsv(353, 94%, 25%)
CMYK	cmyk(0%, 93.8%, 82.8%, 74.9%)
CIE-LAB	lab(10.57, 28.38, 12.05)
CIE-LCH	lch(10.57, 30.83, 23.00°)
OKLab	oklab(24.01% 0.0832 0.0322)
OKLCH	oklch(24.01% 0.089 21.1)
XYZ	xyz(2.2184, 1.2013, 0.4316)
Luminance	0.0120 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40040B #044039

analogous

#400429 #40040B #401B04

triadic

#40040B #0B4004 #040B40

tetradic

#40040B #294004 #044039 #1B0440

square

#40040B #294004 #044039 #1B0440

split-complementary

#40040B #04401B #042940

monochromatic

#1D0205 #1D0205 #40040B #7A0815 #B30B1F

Accessibility & contrast

On white

16.93

#40040B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#40040B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40040B

16.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40040B	#FFFFFF	#000000	##FFFFFF
##40040B	1.00	16.93	1.24	16.93
#FFFFFF	16.93	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17140B

Deuteranopia (green-blind)

#262109

Tritanopia (blue-blind)

#470007

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #40040b;
/* rgb */ color: rgb(64, 4, 11);
/* oklch */ color: oklch(24.0% 0.089 21.1);

Tailwind

colors: {
  custom: {
    50: '#7a4b4b',
    500: '#40040b',
    950: '#000000',
  },
}

SCSS

$custom: #40040b;
$custom-light: #7a4b4b;
$custom-dark: #000000;

JSON

{
  "hex": "#40040b",
  "rgb": {
    "r": 64,
    "g": 4,
    "b": 11
  },
  "hsl": {
    "h": 353,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.2401,
    "c": 0.08922,
    "h": 21.1
  },
  "luminance": 0.01201
}

Semantic roles & 50–950 ramp

primary

#40040B

secondary

#1F8176

accent

#FEE629

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0101

muted

#7C7777

Preview Lab

Preview with #40040B

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

Preview Lab → · Contrast checker → · Palette generator →