#400A0A#400A0A

#400A0A is a very dark, moderate red. Relative luminance 0.013; OKLCH L 24.7% C 0.083 H 25.7°. Best body text is #FFFFFF at 16.59:1 contrast (WCAG AA passes).

Color values

HEX	#400A0A
RGB	rgb(64, 10, 10)
HSL	hsl(0, 73%, 15%)
HSV	hsv(0, 84%, 25%)
CMYK	cmyk(0%, 84.4%, 84.4%, 74.9%)
CIE-LAB	lab(11.48, 25.71, 13.73)
CIE-LCH	lch(11.48, 29.15, 28.10°)
OKLab	oklab(24.68% 0.0745 0.0358)
OKLCH	oklch(24.68% 0.083 25.7)
XYZ	xyz(2.2779, 1.3293, 0.4237)
Luminance	0.0133 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#400A0A #0A4040

analogous

#400A25 #400A0A #40250A

triadic

#400A0A #0A400A #0A0A40

tetradic

#400A0A #25400A #0A4040 #250A40

square

#400A0A #25400A #0A4040 #250A40

split-complementary

#400A0A #0A4025 #0A2540

monochromatic

#1A0404 #1A0404 #400A0A #751212 #AA1B1B

Accessibility & contrast

On white

16.59

#400A0A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#400A0A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #400A0A

16.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##400A0A	#FFFFFF	#000000	##FFFFFF
##400A0A	1.00	16.59	1.27	16.59
#FFFFFF	16.59	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A1709

Deuteranopia (green-blind)

#282308

Tritanopia (blue-blind)

#47000B

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #400a0a;
/* rgb */ color: rgb(64, 10, 10);
/* oklch */ color: oklch(24.7% 0.083 25.7);

Tailwind

colors: {
  custom: {
    50: '#7a4e4b',
    500: '#400a0a',
    950: '#000000',
  },
}

SCSS

$custom: #400a0a;
$custom-light: #7a4e4b;
$custom-dark: #000000;

JSON

{
  "hex": "#400a0a",
  "rgb": {
    "r": 64,
    "g": 10,
    "b": 10
  },
  "hsl": {
    "h": 0,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.24681,
    "c": 0.08262,
    "h": 25.7
  },
  "luminance": 0.01329
}

Semantic roles & 50–950 ramp

primary

#400A0A

secondary

#297D7D

accent

#F0F038

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #400A0A

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

Preview Lab → · Contrast checker → · Palette generator →