#400C0B#400C0B

#400C0B is a very dark, moderate red. Relative luminance 0.014; OKLCH L 24.9% C 0.080 H 26.1°. Best body text is #FFFFFF at 16.47:1 contrast (WCAG AA passes).

Color values

HEX	#400C0B
RGB	rgb(64, 12, 11)
HSL	hsl(1, 71%, 15%)
HSV	hsv(1, 83%, 25%)
CMYK	cmyk(0%, 81.2%, 82.8%, 74.9%)
CIE-LAB	lab(11.81, 24.90, 13.76)
CIE-LCH	lch(11.81, 28.45, 28.93°)
OKLab	oklab(24.93% 0.0722 0.0353)
OKLCH	oklch(24.93% 0.08 26.1)
XYZ	xyz(2.3065, 1.3774, 0.4610)
Luminance	0.0138 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400C0B #0B3F40

analogous

#400B25 #400C0B #40270B

triadic

#400C0B #0B400C #0C0B40

tetradic

#400C0B #25400B #0B3F40 #270B40

square

#400C0B #25400B #0B3F40 #270B40

split-complementary

#400C0B #0B4027 #0B2540

monochromatic

#1A0504 #1A0504 #400C0B #741614 #A8201D

Accessibility & contrast

On white

16.47

#400C0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#400C0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400C0B

16.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400C0B	#FFFFFF	#000000	##FFFFFF
##400C0B	1.00	16.47	1.28	16.47
#FFFFFF	16.47	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B180A

Deuteranopia (green-blind)

#282309

Tritanopia (blue-blind)

#47000C

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #400c0b;
/* rgb */ color: rgb(64, 12, 11);
/* oklch */ color: oklch(24.9% 0.080 26.1);

Tailwind

colors: {
  custom: {
    50: '#7a4f4b',
    500: '#400c0b',
    950: '#000000',
  },
}

SCSS

$custom: #400c0b;
$custom-light: #7a4f4b;
$custom-dark: #000000;

JSON

{
  "hex": "#400c0b",
  "rgb": {
    "r": 64,
    "g": 12,
    "b": 11
  },
  "hsl": {
    "h": 1.132,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.24931,
    "c": 0.08034,
    "h": 26.1
  },
  "luminance": 0.01377
}

Semantic roles & 50–950 ramp

primary

#400C0B

secondary

#2A7B7D

accent

#EAED3A

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #400C0B

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

Preview Lab → · Contrast checker → · Palette generator →