#400B0B#400B0B

#400B0B is a very dark, moderate red. Relative luminance 0.014; OKLCH L 24.8% C 0.081 H 25.4°. Best body text is #FFFFFF at 16.53:1 contrast (WCAG AA passes).

Color values

HEX	#400B0B
RGB	rgb(64, 11, 11)
HSL	hsl(0, 71%, 15%)
HSV	hsv(0, 83%, 25%)
CMYK	cmyk(0%, 82.8%, 82.8%, 74.9%)
CIE-LAB	lab(11.65, 25.34, 13.54)
CIE-LCH	lch(11.65, 28.74, 28.12°)
OKLab	oklab(24.81% 0.0736 0.0349)
OKLCH	oklch(24.81% 0.081 25.4)
XYZ	xyz(2.2947, 1.3538, 0.4570)
Luminance	0.0135 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400B0B #0B4040

analogous

#400B26 #400B0B #40260B

triadic

#400B0B #0B400B #0B0B40

tetradic

#400B0B #26400B #0B4040 #260B40

square

#400B0B #26400B #0B4040 #260B40

split-complementary

#400B0B #0B4026 #0B2640

monochromatic

#1A0404 #1A0404 #400B0B #741414 #A81D1D

Accessibility & contrast

On white

16.53

#400B0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#400B0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400B0B

16.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400B0B	#FFFFFF	#000000	##FFFFFF
##400B0B	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)

#1B170A

Deuteranopia (green-blind)

#282309

Tritanopia (blue-blind)

#47000C

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #400b0b;
/* rgb */ color: rgb(64, 11, 11);
/* oklch */ color: oklch(24.8% 0.081 25.4);

Tailwind

colors: {
  custom: {
    50: '#7a4f4b',
    500: '#400b0b',
    950: '#000000',
  },
}

SCSS

$custom: #400b0b;
$custom-light: #7a4f4b;
$custom-dark: #000000;

JSON

{
  "hex": "#400b0b",
  "rgb": {
    "r": 64,
    "g": 11,
    "b": 11
  },
  "hsl": {
    "h": 0,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.24811,
    "c": 0.08142,
    "h": 25.4
  },
  "luminance": 0.01353
}

Semantic roles & 50–950 ramp

primary

#400B0B

secondary

#2A7D7D

accent

#EDED3A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #400B0B

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

Preview Lab → · Contrast checker → · Palette generator →