#400B0A#400B0A

#400B0A is a very dark, moderate red. Relative luminance 0.014; OKLCH L 24.8% C 0.082 H 26.3°. Best body text is #FFFFFF at 16.53:1 contrast (WCAG AA passes).

Color values

HEX	#400B0A
RGB	rgb(64, 11, 10)
HSL	hsl(1, 73%, 15%)
HSV	hsv(1, 84%, 25%)
CMYK	cmyk(0%, 82.8%, 84.4%, 74.9%)
CIE-LAB	lab(11.63, 25.29, 13.94)
CIE-LCH	lch(11.63, 28.88, 28.86°)
OKLab	oklab(24.8% 0.0731 0.0362)
OKLCH	oklch(24.8% 0.082 26.3)
XYZ	xyz(2.2891, 1.3516, 0.4275)
Luminance	0.0135 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400B0A #0A3F40

analogous

#400A24 #400B0A #40260A

triadic

#400B0A #0A400B #0B0A40

tetradic

#400B0A #24400A #0A3F40 #260A40

square

#400B0A #24400A #0A3F40 #260A40

split-complementary

#400B0A #0A4026 #0A2440

monochromatic

#1A0504 #1A0504 #400B0A #751412 #AA1D1B

Accessibility & contrast

On white

16.53

#400B0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#400B0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400B0A

16.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400B0A	#FFFFFF	#000000	##FFFFFF
##400B0A	1.00	16.53	1.27	16.53
#FFFFFF	16.53	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B1709

Deuteranopia (green-blind)

#282308

Tritanopia (blue-blind)

#47000B

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #400b0a;
/* rgb */ color: rgb(64, 11, 10);
/* oklch */ color: oklch(24.8% 0.082 26.3);

Tailwind

colors: {
  custom: {
    50: '#7a4f4b',
    500: '#400b0a',
    950: '#000000',
  },
}

SCSS

$custom: #400b0a;
$custom-light: #7a4f4b;
$custom-dark: #000000;

JSON

{
  "hex": "#400b0a",
  "rgb": {
    "r": 64,
    "g": 11,
    "b": 10
  },
  "hsl": {
    "h": 1.111,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.24795,
    "c": 0.08158,
    "h": 26.3
  },
  "luminance": 0.01351
}

Semantic roles & 50–950 ramp

primary

#400B0A

secondary

#297C7D

accent

#ECF038

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #400B0A

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

Preview Lab → · Contrast checker → · Palette generator →