#400A0D#400A0D

#400A0D is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.7% C 0.082 H 22.9°. Best body text is #FFFFFF at 16.57:1 contrast (WCAG AA passes).

Color values

HEX	#400A0D
RGB	rgb(64, 10, 13)
HSL	hsl(357, 73%, 15%)
HSV	hsv(357, 84%, 25%)
CMYK	cmyk(0%, 84.4%, 79.7%, 74.9%)
CIE-LAB	lab(11.53, 25.88, 12.47)
CIE-LCH	lch(11.53, 28.72, 25.73°)
OKLab	oklab(24.73% 0.0758 0.0319)
OKLCH	oklch(24.73% 0.082 22.9)
XYZ	xyz(2.2958, 1.3365, 0.5178)
Luminance	0.0134 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400A0D #0A403D

analogous

#400A28 #400A0D #40220A

triadic

#400A0D #0D400A #0A0D40

tetradic

#400A0D #28400A #0A403D #220A40

square

#400A0D #28400A #0A403D #220A40

split-complementary

#400A0D #0A4022 #0A2840

monochromatic

#1A0405 #1A0405 #400A0D #751218 #AA1B23

Accessibility & contrast

On white

16.57

#400A0D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#400A0D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400A0D

16.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400A0D	#FFFFFF	#000000	##FFFFFF
##400A0D	1.00	16.57	1.27	16.57
#FFFFFF	16.57	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A170D

Deuteranopia (green-blind)

#27230B

Tritanopia (blue-blind)

#47000C

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #400a0d;
/* rgb */ color: rgb(64, 10, 13);
/* oklch */ color: oklch(24.7% 0.082 22.9);

Tailwind

colors: {
  custom: {
    50: '#7a4e4c',
    500: '#400a0d',
    950: '#000000',
  },
}

SCSS

$custom: #400a0d;
$custom-light: #7a4e4c;
$custom-dark: #000000;

JSON

{
  "hex": "#400a0d",
  "rgb": {
    "r": 64,
    "g": 10,
    "b": 13
  },
  "hsl": {
    "h": 356.667,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.24734,
    "c": 0.08223,
    "h": 22.9
  },
  "luminance": 0.01336
}

Semantic roles & 50–950 ramp

primary

#400A0D

secondary

#297D79

accent

#F0E538

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #400A0D

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

Preview Lab → · Contrast checker → · Palette generator →